Torque Conversion Calculator
Convert between Nm, lb-ft, lb-in, kgf·m, and even calculate horsepower from torque & RPM. Accurate, free tool for mechanics, engineers, and DIY torque wrench conversion.
Torque Unit Converter
Precision: 4 decimals. Based on standard conversion factors (1 lb·ft = 1.355818 Nm, 1 lb·in = 0.112985 Nm).
Engine: Torque ⇄ Horsepower (HP)
Use RPM + Torque to find HP, or HP + RPM to find Torque. Essential for automotive, performance & industrial applications.
Formula: HP = (Torque (lb·ft) × RPM) / 5252. Nm values are auto-converted to lb·ft for calculation.
Common Torque Conversion Table (2026 reference)
| Newton meter (Nm) | Foot-pound (lb·ft) | Inch-pound (lb·in) | kgf·m |
|---|---|---|---|
| 10 Nm | 7.38 lb·ft | 88.51 lb·in | 1.02 kgf·m |
| 20 Nm | 14.75 lb·ft | 177.02 lb·in | 2.04 kgf·m |
| 50 Nm | 36.88 lb·ft | 442.54 lb·in | 5.10 kgf·m |
| 100 Nm | 73.76 lb·ft | 885.07 lb·in | 10.20 kgf·m |
| 120 Nm | 88.51 lb·ft | 1062.1 lb·in | 12.24 kgf·m |
| 29 Nm | 21.39 lb·ft | 256.67 lb·in | 2.96 kgf·m |
| 353 Nm | 260.36 lb·ft | 3124.3 lb·in | 36.0 kgf·m |
⚡ Quick insight: For torque wrench conversion: multiply Nm × 0.7376 for lb·ft, or lb·ft × 1.3558 for Nm. Our calculator handles these instantly.
Torque Extension Adapter Formula
When using a crowfoot or extension, actual torque = desired torque × (tool length) / (tool length + extension). Example: If your wrench is 12 inches and extension adds 2 inches, multiply desired torque by 0.857. “torque extension conversion calculator” principle applied.
Gearbox Output Torque
Output torque = input torque × gear ratio × efficiency. For industrial gearboxes, you can quickly estimate: 10 Nm input × 5:1 ratio × 95% = 47.5 Nm output. Combined with our torque conversion tool, you can calculate in any unit.
How to Perform Accurate Torque Conversions (3-Step Method)
- Identify the starting unit – Nm, ft·lb, in·lb, or kgf·m.
- Apply the base conversion factor: 1 Nm = 0.737562 lb·ft = 8.85075 lb·in = 0.101972 kgf·m.
- Use our digital converter above – instant results with zero math errors.
✔️ Pro tip 2026: Always verify torque specs for critical fasteners (cylinder heads, wheel lugs) – use both torque wrench conversion calculator and your tool’s manual.
Torque & Power Conversion Formulas
- Nm to lb·ft: lb·ft = Nm × 0.737562
- lb·ft to Nm: Nm = lb·ft × 1.355818
- lb·in to Nm: Nm = lb·in × 0.112985
- Horsepower from Torque: HP = (Torque (lb·ft) × RPM) ÷ 5252
- Torque from HP: Torque (lb·ft) = (HP × 5252) ÷ RPM
Original insight: The often neglected "in-lb to Nm" precision matters for small fasteners in electronics: 1 in·lb = 0.113 Nm – use our converter to avoid overtorque.
More US Utilities & Calculators
Frequently Asked Questions (Torque Conversion)
Multiply Newton meters × 0.73756. For example, 120 Nm × 0.73756 = 88.51 lb·ft. Use our instant calculator for any value.
Foot-pounds measure torque with a 1-foot lever, inch-pounds with 1-inch lever. 1 lb·ft = 12 lb·in. Engine torque uses lb·ft, small bolts use lb·in.
Yes: Force (N) = Torque (Nm) / radius (m). Our tool focuses on rotational unit conversions; for linear force, F = T / r.
Very accurate – we use ISO standard factors (1 lb·ft = 1.355817948 Nm).
Set your wrench to the desired unit after conversion. For example, if spec is 30 Nm but your wrench reads in lb·ft, convert 30 Nm → 22.13 lb·ft. Done.
HP = (Torque in lb·ft × RPM) ÷ 5252. The calculator above auto-converts Nm torque to lb·ft, then shows HP instantly.
Absolutely – first compute output torque (T_out = T_in × gear ratio × efficiency), then use our conversion tool to change units (e.g., Nm to lb·ft). Perfect for drive train design.
Important Disclaimer
TotalCalcHub torque conversion calculator provides estimation & reference only. Always verify critical torque specifications with manufacturer data and calibrated tools. We are not liable for misuse of conversions. For professional safety, confirm with certified torque equipment.