Instant conversion for common engineering units
| From | To | Factor |
|---|---|---|
| 1 inch | 25.4 mm | × 25.4 |
| 1 mm | 0.03937 in | ÷ 25.4 |
| 1 mil | 0.0254 mm | × 0.0254 |
| 1 mil | 25.4 μm | × 25.4 |
| 1 μm | 0.03937 mil | ÷ 25.4 |
| 1 foot | 304.8 mm | × 304.8 |
| Reference Point | °C | °F | K |
|---|---|---|---|
| Absolute Zero | −273.15 | −459.67 | 0 |
| Freezing Point (Water) | 0 | 32 | 273.15 |
| Room Temperature | 20 | 68 | 293.15 |
| Boiling Point (Water) | 100 | 212 | 373.15 |
| 1 MPa = | Value |
|---|---|
| psi | 145.038 psi |
| bar | 10 bar |
| kgf/cm² | 10.197 kgf/cm² |
| kPa | 1000 kPa |
| atm | 9.869 atm |
| 1 N·m = | Value |
|---|---|
| kgf·m | 0.10197 kgf·m |
| lbf·ft | 0.73756 lbf·ft |
| lbf·in | 8.8507 lbf·in |
| N·cm | 100 N·cm |
| 1 N = | Value |
|---|---|
| kgf | 0.10197 kgf |
| lbf | 0.22481 lbf |
| kN | 0.001 kN |
| dyn | 100,000 dyn |
| From | To | Factor |
|---|---|---|
| 1 kg | 2.20462 lb | × 2.20462 |
| 1 lb | 0.45359 kg | × 0.45359 |
| 1 oz | 28.3495 g | × 28.3495 |
| 1 kg | 2 斤 | × 2 |
| 1 公吨 | 1.10231 US ton | × 1.10231 |
| From | To | Factor |
|---|---|---|
| 1 HP | 745.7 W | × 745.7 |
| 1 PS | 735.499 W | × 735.499 |
| 1 kW | 1.35962 PS | × 1.35962 |
| 1 kW | 1.34102 HP | × 1.34102 |
| 1 BTU/h | 0.29307 W | × 0.29307 |
| From | To | Factor |
|---|---|---|
| 1 m/min | 3.28084 ft/min | × 3.28084 |
| 1 m/s | 3.6 km/h | × 3.6 |
| 1 mph | 1.60934 km/h | × 1.60934 |
| 1 m/min | 16.667 mm/s | ÷ 60 × 1000 |
| 1 in/s | 1.524 m/min | × 1.524 |
| From | To | Factor |
|---|---|---|
| 1 in² | 645.16 mm² | × 645.16 |
| 1 ft² | 0.0929 m² | × 0.0929 |
| 1 m² | 10.7639 ft² | × 10.7639 |
| 1 cm² | 100 mm² | × 100 |
| 1 ha | 10,000 m² | × 10,000 |
| From | To | Factor |
|---|---|---|
| 1 in³ | 16.3871 cm³ | × 16.3871 |
| 1 ft³ | 28.3168 L | × 28.3168 |
| 1 L | 0.264172 gal (US) | × 0.264172 |
| 1 gal (US) | 3.78541 L | × 3.78541 |
| 1 mL | 1 cm³ | = 1 cm³ |
| HRC | HV | HB (3000kg) | HRB | HS | Approx. Tensile (MPa) |
|---|---|---|---|---|---|
| 65 | 856 | — | — | 90.5 | — |
| 60 | 713 | — | — | 74.5 | — |
| 55 | 599 | — | — | 61.5 | — |
| 50 | 513 | 488 | — | 51.5 | 1680 |
| 45 | 436 | 421 | — | 43.5 | 1460 |
| 40 | 377 | 370 | — | 37.0 | 1270 |
| 35 | 329 | 327 | — | 31.5 | 1110 |
| 30 | 285 | 283 | — | 26.5 | 960 |
| 25 | 248 | 248 | 100 | 22.5 | 840 |
| 20 | 221 | 221 | 96.5 | 19.0 | 745 |
| HRB scale below 20 HRC: | |||||
| — | 210 | 210 | 93.5 | — | 710 |
| — | 185 | 185 | 87.5 | — | 620 |
| — | 156 | 156 | 79.0 | — | 520 |
| — | 126 | 126 | 67.0 | — | 420 |
| — | 105 | 105 | 55.0 | — | 345 |