// This header file contains convenient literals such as 24_h. It requires a C++11 compiler or higher. // The literals are sorted by category: SI base units, SI derived units, Imperial units, and various units // USAGE: #include #pragma once #include namespace SI { #define LITERAL(_symbol, _factor, _base_unit) \ constexpr auto operator "" _symbol(long double x) { return _base_unit(static_cast(_factor ## L * x)); } \ constexpr auto operator "" _symbol(unsigned long long x) { return _base_unit(static_cast(_factor ## L * x)); } // +++ SI BASE UNITS +++ (each unit sorted from big to small) // // SYMBOL FACTOR BASE UNIT EXAMPLE // ------------------------------------------------------------- // length in... LITERAL(_Gm, 1e9, meters); // 1_Gm (gigameter) LITERAL(_Mm, 1e6, meters); // 1_Mm (megameter) LITERAL(_km, 1e3, meters); // 1_km (kilometer) LITERAL(_m, 1, meters); // 1_m (meter) LITERAL(_dm, 1e-1, meters); // 1_dm (decimeter) LITERAL(_cm, 1e-2, meters); // 1_cm (centimeter) LITERAL(_mm, 1e-3, meters); // 1_mm (millimeter) LITERAL(_um, 1e-6, meters); // 1_um (micrometer) LITERAL(_nm, 1e-9, meters); // 1_nm (nanometer) LITERAL(_pm, 1e-12, meters); // 1_pm (picometer) // time in... LITERAL(_day, 86400, seconds); // 1_day (day on Earth) LITERAL(_days, 86400, seconds); // 2_days(day on Earth) LITERAL(_h, 3600, seconds); // 1_h (hour) LITERAL(_min, 60, seconds); // 1_min (minute) LITERAL(_s, 1, seconds); // 1_s (second) LITERAL(_ms, 1e-3, seconds); // 1_ms (millisecond) LITERAL(_us, 1e-6, seconds); // 1_us (microsecond) LITERAL(_ns, 1e-9, seconds); // 1_ns (nanosecond) LITERAL(_ps, 1e-12, seconds); // 1_ps (picosecond) // mass in... LITERAL(_Gt, 1e12, kilograms); // 1_Gt (metric gigaton) LITERAL(_Mt, 1e9, kilograms); // 1_Mt (metric megaton) LITERAL(_kt, 1e6, kilograms); // 1_kt (metric kiloton) LITERAL(_t, 1e3, kilograms); // 1_t (metric ton) LITERAL(_kg, 1, kilograms); // 1_kg (kilogram) LITERAL(_g, 1e-3, kilograms); // 1_g (gram) LITERAL(_mg, 1e-6, kilograms); // 1_mg (milligram) LITERAL(_ug, 1e-9, kilograms); // 1_ug (microgram) LITERAL(_ng, 1e-12, kilograms); // 1_ng (nanogram) // thermodynamic temperature in... LITERAL(_GK, 1e9, kelvins); // 1_GK (gigakelvin) LITERAL(_MK, 1e6, kelvins); // 1_MK (megakelvin) LITERAL(_kK, 1e3, kelvins); // 1_kK (kilokelvin) LITERAL(_K, 1, kelvins); // 1_K (kelvin) LITERAL(_mK, 1e-3, kelvins); // 1_mK (millikelvin) LITERAL(_uK, 1e-6, kelvins); // 1_uK (microkelvin) LITERAL(_nK, 1e-9, kelvins); // 1_nK (nanokelvin) // electric current (I) in... LITERAL(_GA, 1e9, amperes); // 1_GA (gigaampere) LITERAL(_MA, 1e6, amperes); // 1_MA (megaampere) LITERAL(_kA, 1e3, amperes); // 1_kA (kiloampere) LITERAL(_A, 1, amperes); // 1_A (ampere) LITERAL(_mA, 1e-3, amperes); // 1_mA (milliampere) LITERAL(_uA, 1e-6, amperes); // 1_uA (microampere) LITERAL(_nA, 1e-9, amperes); // 1_nA (nanoampere) LITERAL(_pA, 1e-12, amperes); // 1_pA (picoampere) // amount of substance (N_A) in... LITERAL(_Mmol, 1e6, moles); // 1_Mmol (megamole) LITERAL(_kmol, 1e3, moles); // 1_kmol (kilomole) LITERAL(_mol, 1, moles); // 1_mol (mole) LITERAL(_mmol, 1e-3, moles); // 1_mmol (millimole) LITERAL(_umol, 1e-6, moles); // 1_umol (micromole) LITERAL(_nmol, 1e-9, moles); // 1_nmol (nanomole) LITERAL(_pmol, 1e-12, moles); // 1_pmol (picomole) LITERAL(_fmol, 1e-15, moles); // 1_fmol (femtomole) // luminous intensity (J) in... LITERAL(_kcd, 1e3, candelas); // 1_kcd (kilocandela) LITERAL(_cd, 1, candelas); // 1_cd (candela) // +++ SI DERIVED UNITS +++ // // SYMBOL FACTOR BASE UNIT EXAMPLE // ---------------------------------------------------- // area in... LITERAL(_km², 1e6, meters2); // 1_km² (square kilometer) LITERAL(_hm², 1e4, meters2); // 1_hm² (hectare) LITERAL(_m², 1, meters2); // 1_m² (square meter) LITERAL(_cm², 1e-4, meters2); // 1_cm² (square centimeter) LITERAL(_mm², 1e-6, meters2); // 1_mm² (square millimeter) LITERAL(_um², 1e-9, meters2); // 1_um² (square micrometer) // per area in... LITERAL(_per_km²,1e-6, per_meter2); // 1_per_km² (per square kilometer) LITERAL(_per_hm²,1e-4, per_meter2); // 1_per_hm² (per hectare) LITERAL(_per_m², 1, per_meter2); // 1_per_m² (per square meter) LITERAL(_per_cm², 1e4, per_meter2); // 1_per_cm² (per square centimeter) LITERAL(_per_mm², 1e6, per_meter2); // 1_per_mm² (per square millimeter) LITERAL(_per_μm², 1e9, per_meter2); // 1_per μm² (per square micrometer) // surface flow (s) in... LITERAL(_m²_per_s, 1, meters2_per_second); // 1_m²/s (square meter per second) // volume in... LITERAL(_km³, 1e9, meters3); // 1_km³ (cubic kilometer) LITERAL(_m³, 1, meters3); // 1_m³ (cubic meter) LITERAL(_dm³, 1e-3, meters3); // 1_dm³ (cubic decimeter) LITERAL(_cm³, 1e-6, meters3); // 1_cm³ (cubic centimeter, aka ccm) LITERAL(_mm³, 1e-9, meters3); // 1_mm³ (cubic millimeter) LITERAL(_um³, 1e-12, meters3); // 1_um³ (cubic micrometer) // or in... LITERAL(_hl, 0.1, meters3); // 1_hl (hectoliter) LITERAL(_l, 1e-3, meters3); // 1_l (liter) LITERAL(_ml, 1e-6, meters3); // 1_ml (milliliter) LITERAL(_ul, 1e-9, meters3); // 1_ul (microliter) LITERAL(_nl, 1e-12, meters3); // 1_nl (nanoliter) LITERAL(_pl, 1e-15, meters3); // 1_pl (picoliter) // volumetric flow (V) in... LITERAL(_m³_per_s, 1, meters3_per_second); // 1_m³/s (cubic meter per second) LITERAL(_l_per_min,1.0/60000.0, meters3_per_second); // 1_l_per_min (liter per minute) LITERAL(_l_per_s, 1e-3, meters3_per_second); // 1_l_per_s (liter per second) // velocity (v) in... LITERAL(_km_per_s, 1e3, meters_per_second); // 1_km_per_s (km/s) LITERAL(_m_per_s, 1, meters_per_second); // 1_m_per_s (m/s) LITERAL(_km_per_h, 1, kilometers_per_hour); // 1_km_per_h (km/h) LITERAL(_mm_per_h, 1, millimeters_per_hour);// 1_mm_per_h (mm/h) // acceleration (a) in... LITERAL(_km_per_s²,1e3, meters_per_second2);// 1_km_per_s² (km/s²) LITERAL(_m_per_s², 1, meters_per_second2); // 1_m_per_s² (m/s²) // frequency (f) in... LITERAL(_THz, 1e12, hertz); // 1_THz (terahertz) LITERAL(_GHz, 1e9, hertz); // 1_GHz (gigahertz) LITERAL(_MHz, 1e6, hertz); // 1_MHz (megahertz) LITERAL(_kHz, 1e3, hertz); // 1_kHz (kilohertz) LITERAL(_Hz, 1, hertz); // 1_Hz (hertz) LITERAL(_mHz, 1e-3, hertz); // 1_mHz (millihertz) // radioactive activity (A) in... LITERAL(_TBq, 1e12, hertz); // 1_TBq (terabecquerel) LITERAL(_GBq, 1e9, hertz); // 1_GBq (gigabecquerel) LITERAL(_MBq, 1e6, hertz); // 1_MBq (megabecquerel) LITERAL(_kBq, 1e3, hertz); // 1_kBq (kilobecquerel) LITERAL(_Bq, 1, hertz); // 1_Bq (becquerel) // absorbed dose (D) in... LITERAL(_Gy, 1, grays); // 1_Gy (gray) LITERAL(_mGy, 1e-3, grays); // 1_mGy (milligray) LITERAL(_uGy, 1e-6, grays); // 1_uGy (microgray) // equivalent dose (H) and effective dose (E) in... LITERAL(_Sv, 1, sieverts); // 1_Sv (sievert) LITERAL(_mSv, 1e-3, sieverts); // 1_mSv (millisievert) LITERAL(_uSv, 1e-6, sieverts); // 1_uSv (microsievert) // mass per area in... LITERAL(_t_per_m², 1e3, kilograms_per_meter2);// 1_t_per_m² LITERAL(_kg_per_m², 1, kilograms_per_meter2);// 1_kg_per_m² // density in... LITERAL(_t_per_m³, 1e3, kilograms_per_meter3);// 1_t_per_m³ LITERAL(_kg_per_m³, 1, kilograms_per_meter3);// 1_kg_per_m³ LITERAL(_g_per_m³,1e-3, kilograms_per_meter3);// 1_g_per_m³ LITERAL(_mg_per_m³,1e-9, kilograms_per_meter3);// 1_mg_per_m³ LITERAL(_kg_per_cm³,1e-6, kilograms_per_meter3);// 1_kg_per_cm³ LITERAL(_g_per_cm³,1e3, kilograms_per_meter3);// 1_g_per_cm³ // electric potential (U) in... LITERAL(_GV, 1e9, volts); // 1_GV (gigavolt) LITERAL(_MV, 1e6, volts); // 1_MV (megavolt) LITERAL(_kV, 1e3, volts); // 1_kV (kilovolt) LITERAL(_V, 1, volts); // 1_V LITERAL(_mV, 1e-3, volts); // 1_mV (millivolt) LITERAL(_uV, 1e-6, volts); // 1_uV (microvolt) LITERAL(_nV, 1e-9, volts); // 1_nV (nanovolt) LITERAL(_pV, 1e-12, volts); // 1_pV (picovolt) // electric resistance (R) in... LITERAL(_GOhm, 1e9, ohms); // 1_GOhm (gigaohm) LITERAL(_MOhm, 1e6, ohms); // 1_MOhm (megaohm) LITERAL(_kOhm, 1e3, ohms); // 1_kOhm (kiloohm) LITERAL(_Ohm, 1, ohms); // 1_Ohm LITERAL(_mOhm, 1e-3, ohms); // 1_mOhm (milliohm) LITERAL(_uOhm, 1e-6, ohms); // 1_uOhm (microohm) // electric resistance meter in... LITERAL(_Ohm_m, 1, ohm_meters); // 1_Ohm_m (ohm meter) // electric conductance (G) in... LITERAL(_MS, 1e6, siemens); // 1_MS (megasiemens) LITERAL(_kS, 1e3, siemens); // 1_kS (kilosiemens) LITERAL(_S, 1, siemens); // 1_S (siemens) LITERAL(_mS, 1e-3, siemens); // 1_mS (millisiemens) LITERAL(_uS, 1e-6, siemens); // 1_uS (microsiemens) // electric conductivity (σ) in... LITERAL(_MS_per_m,1e6, siemens_per_meter); // 1_MS_per_m (MS/m, megasiemens per meter) LITERAL(_kS_per_m,1e3, siemens_per_meter); // 1_kS_per_m (kS/m, kilosiemens per meter) LITERAL(_S_per_m, 1, siemens_per_meter); // 1_S_per_m (S/m, siemens per meter) // electric charge (Q) in... LITERAL(_C, 1, coulombs); // 1_C (coulomb) LITERAL(_GAh, 1e9, ampere_hours); // 1_GAh (gigaampere-hours) LITERAL(_MAh, 1e6, ampere_hours); // 1_MAh (megaampere-hours) LITERAL(_kAh, 1e3, ampere_hours); // 1_kAh (kiloampere-hours) LITERAL(_Ah, 1, ampere_hours); // 1_Ah (ampere-hours) LITERAL(_mAh, 1e-3, ampere_hours); // 1_mAh (milliampere-hours) LITERAL(_uAh, 1e-6, ampere_hours); // 1_uAh (microampere-hours) // electric capacitance (C) in... LITERAL(_F, 1, farads); // 1_F (farad) LITERAL(_mF, 1e-3, farads); // 1_mF (millifarad) LITERAL(_uF, 1e-6, farads); // 1_uF (microfarad) LITERAL(_nF, 1e-9, farads); // 1_nF (nanofarad) LITERAL(_pF, 1e-12, farads); // 1_pF (picofarad) // electric inductance (L) in... LITERAL(_H, 1, henrys); // 1_H (henry) LITERAL(_mH, 1e-3, henrys); // 1_mH (millihenry) LITERAL(_uH, 1e-6, henrys); // 1_uH (microhenry) LITERAL(_nH, 1e-9, henrys); // 1_nH (nanohenry) // magnetic flux in... LITERAL(_Wb, 1, webers); // 1_Wb (weber) // magnetic field (B) in... LITERAL(_kT, 1e3, teslas); // 1_kT (kilotesla) LITERAL(_T, 1, teslas); // 1_T (tesla) LITERAL(_mT, 1e-3, teslas); // 1_mT (millitesla) LITERAL(_uT, 1e-6, teslas); // 1_uT (microtesla) LITERAL(_nT, 1e-9, teslas); // 1_nT (nanotesla) // energy (E) in... LITERAL(_PJ, 1e15, joules); // 1_PJ (petajoule) LITERAL(_TJ, 1e12, joules); // 1_TJ (terajoule) LITERAL(_GJ, 1e9, joules); // 1_GJ (gigajoule) LITERAL(_MJ, 1e6, joules); // 1_MJ (megajoule) LITERAL(_kJ, 1e3, joules); // 1_kJ (kilojoule) LITERAL(_J, 1, joules); // 1_J (joule) LITERAL(_mJ, 1e-3, joules); // 1_mJ (millijoule) LITERAL(_kJ_per_mol,1e3,joules_per_mol); // 1_kJ_per_mol (kJ/mol) // or in... LITERAL(_cal, 4.1868, joules); // 1_cal (calorie) LITERAL(_kcal,4186.8, joules); // 1_kcal (kilocalorie) // active power (P) in... LITERAL(_TW, 1e12, watts); // 1_TW (terawatt) LITERAL(_GW, 1e9, watts); // 1_GW (gigawatt) LITERAL(_MW, 1e6, watts); // 1_MW (megawatt) LITERAL(_kW, 1e3, watts); // 1_kW (kilowatt) LITERAL(_W, 1, watts); // 1_W (watt) LITERAL(_mW, 1e-3, watts); // 1_mW (milliwatt) LITERAL(_uW, 1e-6, watts); // 1_uW (microwatt) LITERAL(_TWh, 3.6e15, watts); // 1_TWh (terawatt-hour) LITERAL(_GWh, 3.6e12, watts); // 1_GWh (gigawatt-hour) LITERAL(_MWh, 3.6e9, watts); // 1_MWh (megawatt-hour) LITERAL(_kWh, 3.6e6, watts); // 1_kWh (kilowatt-hour) LITERAL(_Wh, 3.6e3, watts); // 1_Wh (watt-hour) // active power per mass in... LITERAL(_kWh_per_kg, 3.6e6, joules_per_second_per_kilogram); // 1_kWh_per_kg (kilowatt-hour per kilogram) LITERAL(_Wh_per_kg, 3.6e3, joules_per_second_per_kilogram); // 1_Wh_per_kg (watt-hour per kilogram) // power intensity (I) in... LITERAL(_MW_per_m²,1e6, watts_per_meter2); // 1_MW_per_m² (kilowatt per square metre) LITERAL(_kW_per_m²,1e3, watts_per_meter2); // 1_kW_per_m² (kilowatt per square metre) LITERAL(_W_per_m², 1, watts_per_meter2); // 1_W_per_m² (watt per square metre) LITERAL(_mW_per_m²,1e-3, watts_per_meter2); // 1_mW_per_m² (milliwatt per square metre) LITERAL(_uW_per_m²,1e-6, watts_per_meter2); // 1_uW_per_m² (milliwatt per square metre) // pressure (p) in... LITERAL(_GPa, 1e9, pascals); // 1_GPa (gigapascal) LITERAL(_MPa, 1e6, pascals); // 1_MPa (megapascal) LITERAL(_kPa, 1e3, pascals); // 1_kPa (kilopascal) LITERAL(_hPa, 100, pascals); // 1_hPa (hectopascal) LITERAL(_Pa, 1, pascals); // 1_Pa (pascal) LITERAL(_mPa, 1e-3, pascals); // 1_mPa (millipascal) LITERAL(_uPa, 1e-6, pascals); // 1_uPa (micropascal) // force (F) in... LITERAL(_ZN, 1e21, newtons); // 1_ZN (zettanewton) LITERAL(_EN, 1e18, newtons); // 1_EN (exanewton) LITERAL(_PN, 1e15, newtons); // 1_PN (petanewton) LITERAL(_TN, 1e12, newtons); // 1_TN (teranewton) LITERAL(_GN, 1e9, newtons); // 1_GN (giganewton) LITERAL(_MN, 1e6, newtons); // 1_MN (meganewton) LITERAL(_kN, 1e3, newtons); // 1_kN (kilonewton) LITERAL(_N, 1, newtons); // 1_N (newton) LITERAL(_mN, 1e-3, newtons); // 1_mN (millinewton) LITERAL(_uN, 1e-6, newtons); // 1_uN (micronewton) LITERAL(_pN, 1e-9, newtons); // 1_pN (piconewton) // luminous flux (m) in... LITERAL(_lm, 1, lumens); // 1_lm (lumen) LITERAL(_lm_s, 1, lumenseconds); // 1_lm_s (lumen second) LITERAL(_lm_per_W, 1, lumens_per_watt); // 1_lm_per_W (lumen per watt) // luminous flux per area in... LITERAL(_klx, 1e3, lux); // 1_klx (kilolux) LITERAL(_lx, 1, lux); // 1_lx (lux) LITERAL(_mlx, 1e-3, lux); // 1_mlx (millilux) LITERAL(_ulx, 1e-6, lux); // 1_ulx (microlux) LITERAL(_plx, 1e-9, lux); // 1_plx (picolux) // catalytic activity in... LITERAL(_kat, 1, mols_per_second); // 1_kat (katal) LITERAL(_mkat, 1e-3, mols_per_second); // 1_mkat (millikatal) LITERAL(_mukat, 1e-6, mols_per_second); // 1_mukat (microkatal) LITERAL(_nkat, 1e-9, mols_per_second); // 1_nkat (nanokatal) // other... LITERAL(_Nm, 1, newtonmeters); // 1_Nm (newtonmeter) LITERAL(_rad, 1, radians); // 1_rad (radian) LITERAL(_deg,0.01745329251994329576923690768489, radians); // 1_deg (angle degree) LITERAL(_sr, 1, steradians); // 1_sr (steradian) LITERAL(_km³_per_s²,1e9, meters3_per_second2);// 1_km³_per_s² (km³/s²) LITERAL(_kg_per_mol,1,kilograms_per_mol); // 1_kg_per_mol (kg/mol) LITERAL(_kg_per_W, 1,kilograms_per_watt); // 1_kg_per_W (kg/W) LITERAL(_kg_per_kW,1e-3,kilograms_per_watt); // 1_kg_per_kW (kg/kW) // +++ IMPERIAL UNITS +++ // // SYMBOL FACTOR BASE UNIT EXAMPLE // ------------------------------------------------------------- // length in... LITERAL(_in, 0.0254, meters); // 1_in (inch) LITERAL(_ft, .3048, meters); // 1_ft (feet, 12 inches) LITERAL(_yd, .9144, meters); // 1_yd (yard) LITERAL(_mi, 1'609.344, meters); // 1_mi (statute mile, 1760 yd or 80 chains) LITERAL(_cable, 185.2, meters); // 1_cable (one tenth of a nautical mile) LITERAL(_nmi, 1'852, meters); // 1_nmi (nautical mile, about one arc minute) LITERAL(_NM, 1'852, meters); // 1_NM (nautical mile, about one arc minute) // mass in... LITERAL(_oz, 28.349'523'125, grams); // 1_oz (ounce, 1/16 of a pound) LITERAL(_lb, 0.45359237, kilograms);// 1_lb (pound) // volume in... LITERAL(_gal, 4.54609e-3, meters3);// 1_gal (US gallon) // velocity in... LITERAL(_kn, 1.852, kilometers_per_hour); // 1_kn (knots) LITERAL(_ft_per_min, 0.00508, meters_per_second); // 1_ft_per_min (feet/min) LITERAL(_in_per_s, 0.0254, meters_per_second); // 1_in_per_s (inch/sec) LITERAL(_in_per_h, 0.0000070556, meters_per_second); // 1_in_per_h (inch/hour) LITERAL(_mph, .44704, meters_per_second); // 1_mph (miles/hour) // temperature in... LITERAL(_degF, 1, fahrenheit); // 1_degF (°Fahrenheit) // +++ VARIOUS UNITS +++ // // SYMBOL FACTOR BASE UNIT EXAMPLE // ------------------------------------------------------------- // astronomical units in... LITERAL(_Gpc, 30'856'775'814'913'673e9, meters); // 1_Gpc (gigaparsec, as of IAU 2012) LITERAL(_Mpc, 30'856'775'814'913'673e6, meters); // 1_Mpc (megaparsec, as of IAU 2012) LITERAL(_kpc, 30'856'775'814'913'673e3, meters); // 1_kpc (kiloparsec, as of IAU 2012) LITERAL(_pc, 30'856'775'814'913'673e0, meters); // 1_pc (parsec, as of IAU 2012) LITERAL(_ly, 9'460'730'472'580'800, meters); // 1_ly (light-year) LITERAL(_au, 149'597'870'700, meters); // 1_au (astronomical unit) LITERAL(_AU, 149'597'870'700, meters); // 1_AU (astronomical unit) LITERAL(_Msun, 1.98892e30, kilograms);// 1_Msun (solar mass, about the mass of the Sun) LITERAL(_Mjup, 1.898e27, kilograms);// 1_Mjup (Jupiter mass) LITERAL(_Mearth, 5.9742e24, kilograms);// 1_Mearth (Earth mass) // digital units in... LITERAL(_byte, 1, bytes); // 1_byte LITERAL(_kB, 1e3, bytes); // 1_kB (kilobyte) LITERAL(_MB, 1e6, bytes); // 1_MB (megabyte) LITERAL(_GB, 1e9, bytes); // 1_GB (gigabyte) LITERAL(_TB, 1e12, bytes); // 1_TB (terabyte) LITERAL(_PB, 1e15, bytes); // 1_PB (terabyte) LITERAL(_EB, 1e18, bytes); // 1_EB (exabyte) LITERAL(_ZB, 1e21, bytes); // 1_ZB (zettabyte) LITERAL(_YB, 1e24, bytes); // 1_ZY (yottabyte) LITERAL(_RB, 1e27, bytes); // 1_RY (ronnabyte) LITERAL(_QB, 1e30, bytes); // 1_QY (quettabyte) LITERAL(_KBps, 1e3, bytes_per_second); // 1_KBps (kilobyte/sec) LITERAL(_MBps, 1e6, bytes_per_second); // 1_MBps (megabyte/sec) LITERAL(_GBps, 1e9, bytes_per_second); // 1_GBps (gigabyte/sec) LITERAL(_TBps, 1e12, bytes_per_second); // 1_TBps (terabyte/sec) LITERAL(_Kbps, 1e3 / 8, bytes_per_second); // 1_Kbps (kilobit/sec) LITERAL(_Mbps, 1e6 / 8, bytes_per_second); // 1_Mbps (megabit/sec) LITERAL(_Gbps, 1e9 / 8, bytes_per_second); // 1_Gbps (gigabit/sec) LITERAL(_Tbps, 1e12 / 8, bytes_per_second); // 1_Tbps (terabit/sec) // pressure in... LITERAL(_Gbar, 1e14, pascals); // 1_Gbar (gigabar) LITERAL(_Mbar, 1e11, pascals); // 1_Mbar (megabar) LITERAL(_kbar, 1e8, pascals); // 1_kbar (kilobar) LITERAL(_bar, 1e5, pascals); // 1_bar LITERAL(_mbar, 1e2, pascals); // 1_mbar (millibar) LITERAL(_psi, 6'894.76, pascals); // 1_psi (pound per square inch) LITERAL(_atm, 101'325, pascals); // 1_atm (atmosphere) LITERAL(_inHg, 3'386.39, pascals); // 1_inHg (inch of mercury) LITERAL(_mmHg, 101'325.0 / 760.0, pascals); // 1_mmHg (millimetre of mercury) LITERAL(_Torr, 101'325.0 / 760.0, pascals); // 1_Torr (same as mmHg) // various units: LITERAL(_degC, 1, celsius); // 1_degC (°Celsius) LITERAL(_degR, 5.0/9.0, kelvins); // 1_degR (°Rankine) LITERAL(_Mach, 330, meters_per_second); // 1_Mach LITERAL(_Da, 1.660'539'068'9252e-27, kilograms);// 1_Da (dalton, or unified atomic mass unit) LITERAL(_eV, 1.602'176'634e-19, joules); // 1_eV (electronvolt, as of 2019 SI) LITERAL(_hp, 745.69987158227022, watts); // 1_hp (horsepower) LITERAL(_shp, 745.69987158227022, watts); // 1_shp (shaft horsepower) LITERAL(_PS, 735.49875, watts); // 1_PS ('Pferdestärke', german horsepower) LITERAL(_Ang, 1e-10, meters); // 1_Ang (angstrom) LITERAL(_percent, 0.01, dimensionless); // 1_percent (%, per hundred) LITERAL(_bpm, 1.0/60.0, hertz); // 1_bpm (beats per minute) LITERAL(_smoot, 1.7018, meters); // 1_smoot (one Oliver R. Smoot height, fun unit) #undef LITERAL } // namespace SI // References // ---------- // 1. https://en.wikipedia.org/wiki/International_System_of_Units // 2. https://en.wikipedia.org/wiki/Astronomical_system_of_units // 3. https://en.wikipedia.org/wiki/Imperial_units