Reference sheet
Engineering conversion cheat sheet
The conversions engineers and engineering students reach for most, on one printable page. Every value comes from the same exact definitions the Unitglide converters use.
Length & area| From | Equals | Reverse |
|---|
| 1 in | 25.4 mm | 0.03937008 in per mm |
| 1 ft | 0.3048 m | 3.28084 ft per m |
| 1 mi | 1.609344 km | 0.6213712 mi per km |
| 1 ft² | 0.09290304 m² | 10.76391 ft² per m² |
| 1 in² | 645.16 mm² | 0.001550003 in² per mm² |
Mass & force| From | Equals | Reverse |
|---|
| 1 lb | 0.4535924 kg | 2.204623 lb per kg |
| 1 slug | 14.5939 kg | 0.06852177 slug per kg |
| 1 lbf | 4.448222 N | 0.2248089 lbf per N |
| 1 kip | 4.448222 kN | 0.2248089 kip per kN |
| 1 kgf | 9.80665 N | 0.1019716 kgf per N |
Pressure & stress| From | Equals | Reverse |
|---|
| 1 psi | 6.894757 kPa | 0.1450377 psi per kPa |
| 1 psi | 0.006894757 MPa | 145.0377 psi per MPa |
| 1 ksi | 6.894757 MPa | 0.1450377 ksi per MPa |
| 1 bar | 14.50377 psi | 0.06894757 bar per psi |
| 1 atm | 101.325 kPa | 0.009869233 atm per kPa |
| 1 inH₂O | 249.0889 Pa | 0.004014631 inH₂O per Pa |
Torque & energy| From | Equals | Reverse |
|---|
| 1 lbf·ft | 1.355818 N·m | 0.7375621 lbf·ft per N·m |
| 1 lbf·in | 0.1129848 N·m | 8.850746 lbf·in per N·m |
| 1 BTU | 1.055056 kJ | 0.9478171 BTU per kJ |
| 1 kWh | 3.6 MJ | 0.2777778 kWh per MJ |
| 1 ft·lbf | 1.355818 J | 0.7375621 ft·lbf per J |
Power| From | Equals | Reverse |
|---|
| 1 hp | 0.7456999 kW | 1.341022 hp per kW |
| 1 BTU/h | 0.2930711 W | 3.412142 BTU/h per W |
| 1 TR | 3.516853 kW | 0.2843451 TR per kW |
Flow| From | Equals | Reverse |
|---|
| 1 gpm (US) | 3.785412 L/min | 0.2641721 gpm (US) per L/min |
| 1 cfm | 1.699011 m³/h | 0.5885778 cfm per m³/h |
| 1 ft³/s | 0.02831685 m³/s | 35.31467 ft³/s per m³/s |
| 1 lb/h | 0.4535924 kg/h | 2.204623 lb/h per kg/h |
Density & viscosity| From | Equals | Reverse |
|---|
| 1 lb/ft³ | 16.01846 kg/m³ | 0.06242796 lb/ft³ per kg/m³ |
| 1 g/cm³ | 1,000 kg/m³ | 0.001 g/cm³ per kg/m³ |
| 1 cP | 0.001 Pa·s | 1,000 cP per Pa·s |
| 1 cSt | 0.000001 m²/s | 1,000,000 cSt per m²/s |
Heat transfer| From | Equals | Reverse |
|---|
| 1 BTU/(h·ft·°F) | 1.730735 W/(m·K) | 0.5777893 BTU/(h·ft·°F) per W/(m·K) |
| 1 BTU/(h·ft²) | 3.154591 W/m² | 0.3169983 BTU/(h·ft²) per W/m² |
| 1 BTU/(h·ft²·°F) | 5.678263 W/(m²·K) | 0.1761102 BTU/(h·ft²·°F) per W/(m²·K) |
Electrical| From | Equals | Reverse |
|---|
| 1 mA·h | 3.6 C | 0.2777778 mA·h per C |
| 1 A·h | 3,600 C | 0.0002777778 A·h per C |
| 1 kΩ | 1,000 Ω | 0.001 kΩ per Ω |
| 1 µF | 1,000 nF | 0.001 µF per nF |
Unitglide · unitglide.app/reference/engineering-conversions · Factors from NIST SP 811, NIST Handbook 44 and the BIPM SI Brochure (9th ed.). Values rounded to 7 significant figures unless exact.
