Convert Newton-metre to Joule
1 newton-metre = 1 joule (J). For example, 10 newton-metre = 10 joule and 100 newton-metre = 100 joule. Type any value below to convert newton-metre to joule both ways — it runs entirely in your browser.
Torque vs energy: Newton-metre (N·m) is used both as a unit of ENERGY — where 1 N·m = 1 joule exactly — and as a unit of TORQUE (a twisting force × distance). This page converts the ENERGY meaning, so the figures above are correct for work and heat. A newton-metre of torque is a different physical quantity and does NOT convert into joules, kilowatt-hours or calories.
Quick answer: Newton-metre to Joule
1 Newton-metre = 1 Joule (N·m → J). To convert newton-metre to joule, multiply by 1. To convert joule to newton-metre, multiply by 1. The converter at the top does this instantly and both ways; the sections below give the formula, worked examples, a full conversion chart and answers to the most common newton-metre-to-joule questions.
How to convert Newton-metre to Joule
To convert newton-metre to joule, multiply the number of newton-metre by the conversion factor 1, because 1 N·m = 1 J. The conversion is linear, so the same factor works for any value — whole numbers, decimals or fractions. For the reverse direction, 1 J = 1 N·m, so you divide by 1 (or multiply by 1) to turn joule back into newton-metre.
J = N·m × 1 ·
N·m = J × 1
- Write down the value you want to convert, in newton-metre.
- Multiply it by 1.
- The result is the same area/length/quantity expressed in joule.
Newton-metre to Joule — worked examples
Each row shows the exact arithmetic so you can follow the conversion step by step. For example, 5 newton-metre is 5 joule because 5 N·m × 1 = 5 J.
| Newton-metre | Calculation | Joule |
|---|---|---|
| 1 N·m | 1 N·m × 1 = 1 J | 1 J |
| 2 N·m | 2 N·m × 1 = 2 J | 2 J |
| 3 N·m | 3 N·m × 1 = 3 J | 3 J |
| 5 N·m | 5 N·m × 1 = 5 J | 5 J |
| 7 N·m | 7 N·m × 1 = 7 J | 7 J |
| 10 N·m | 10 N·m × 1 = 10 J | 10 J |
| 12 N·m | 12 N·m × 1 = 12 J | 12 J |
| 15 N·m | 15 N·m × 1 = 15 J | 15 J |
| 20 N·m | 20 N·m × 1 = 20 J | 20 J |
| 25 N·m | 25 N·m × 1 = 25 J | 25 J |
| 50 N·m | 50 N·m × 1 = 50 J | 50 J |
| 100 N·m | 100 N·m × 1 = 100 J | 100 J |
Common Newton-metre to Joule conversions
These are the newton-metre-to-joule values people look up most often. Every figure is computed from the exact factor, so you can rely on them for quick reference:
- 1 newton-metre = 1 joule
- 2 newton-metre = 2 joule
- 2.5 newton-metre = 2.5 joule
- 3 newton-metre = 3 joule
- 4 newton-metre = 4 joule
- 5 newton-metre = 5 joule
- 6 newton-metre = 6 joule
- 7 newton-metre = 7 joule
- 8 newton-metre = 8 joule
- 9 newton-metre = 9 joule
- 10 newton-metre = 10 joule
- 12 newton-metre = 12 joule
- 15 newton-metre = 15 joule
- 20 newton-metre = 20 joule
- 25 newton-metre = 25 joule
- 30 newton-metre = 30 joule
- 50 newton-metre = 50 joule
- 75 newton-metre = 75 joule
- 100 newton-metre = 100 joule
- 200 newton-metre = 200 joule
- 500 newton-metre = 500 joule
- 1000 newton-metre = 1,000 joule
Newton-metre to Joule conversion chart (both directions)
The chart below converts newton-metre to joule and joule to newton-metre side by side, so it works whichever way you need. 1 newton-metre = 1 joule, and 1 joule = 1 newton-metre.
| Newton-metre → Joule | Joule → Newton-metre |
|---|---|
| 0.25 N·m = 0.25 J | 0.25 J = 0.25 N·m |
| 0.5 N·m = 0.5 J | 0.5 J = 0.5 N·m |
| 1 N·m = 1 J | 1 J = 1 N·m |
| 2 N·m = 2 J | 2 J = 2 N·m |
| 3 N·m = 3 J | 3 J = 3 N·m |
| 4 N·m = 4 J | 4 J = 4 N·m |
| 5 N·m = 5 J | 5 J = 5 N·m |
| 6 N·m = 6 J | 6 J = 6 N·m |
| 7 N·m = 7 J | 7 J = 7 N·m |
| 8 N·m = 8 J | 8 J = 8 N·m |
| 9 N·m = 9 J | 9 J = 9 N·m |
| 10 N·m = 10 J | 10 J = 10 N·m |
| 12 N·m = 12 J | 12 J = 12 N·m |
| 15 N·m = 15 J | 15 J = 15 N·m |
| 20 N·m = 20 J | 20 J = 20 N·m |
| 25 N·m = 25 J | 25 J = 25 N·m |
| 30 N·m = 30 J | 30 J = 30 N·m |
| 40 N·m = 40 J | 40 J = 40 N·m |
| 50 N·m = 50 J | 50 J = 50 N·m |
| 75 N·m = 75 J | 75 J = 75 N·m |
| 100 N·m = 100 J | 100 J = 100 N·m |
| 150 N·m = 150 J | 150 J = 150 N·m |
| 200 N·m = 200 J | 200 J = 200 N·m |
| 250 N·m = 250 J | 250 J = 250 N·m |
| 500 N·m = 500 J | 500 J = 500 N·m |
| 1000 N·m = 1,000 J | 1000 J = 1,000 N·m |
Newton-metre vs Joule: which is bigger?
A newton-metre is the larger unit: one newton-metre equals 1 joule. Put another way, you need 1 joules to make a single newton-metre.
What is a Newton-metre? History, origin and usage
The newton-metre honours Isaac Newton (1642-1727), whose laws of motion define force, and it is built directly from two SI units — the newton of force and the metre of distance. It leads a double life: as energy (work = force × distance moved) it equals exactly one joule, while as torque (a turning effort = force × lever arm) it is a separate physical quantity.
In everyday engineering the newton-metre is overwhelmingly a TORQUE unit — wheel-nut and bolt tightening specifications, engine output and tool ratings are quoted in N·m. As an energy unit it is interchangeable with the joule, but standards bodies discourage that usage to avoid mixing up turning effort with energy.
Although a newton-metre of torque and a joule of energy share identical SI base units (kg·m²·s⁻²), torque does not “convert” into joules, kilowatt-hours or calories — it is a vector quantity (a cross product), whereas energy is a scalar (a dot product). That is why a torque wrench is marked in N·m, never in joules.
What is a Joule? History, origin and usage
The joule is named after the English physicist James Prescott Joule (1818-1889), a Salford brewer’s son who, through painstaking experiments in the 1840s, measured the mechanical equivalent of heat and showed that work and heat are interchangeable forms of energy. The name was proposed by Wilhelm Siemens at an 1882 British Association meeting, and the joule was adopted as an international unit at the 1889 International Electrical Congress — just weeks before Joule himself died.
As the SI unit of energy, the joule underpins all of physics and engineering, measuring mechanical work, heat and electrical energy alike (one joule is also one watt-second). It appears on European food labels (usually as kilojoules), in battery specifications, and anywhere energy must be stated in coherent SI units.
One joule is roughly the energy needed to lift a small apple (about 100 grams) one metre against gravity, or the kinetic energy of a 56-gram tennis ball travelling about 6 m/s. Because one joule equals one newton-metre, the joule is dimensionally identical to the newton-metre of torque, yet the two describe different physical quantities.
Convert 1 Newton-metre to other units
It can help to see a newton-metre next to the other units it is commonly compared with. One newton-metre (N·m) is equal to:
| 1 Newton-metre equals | Unit |
|---|---|
| 1 J | Joule |
| 0.001 kJ | Kilojoule |
| 0.000001 MJ | Megajoule |
| 0.0002777778 Wh | Watt-hour |
| 0.0000002777778 kWh | Kilowatt-hour |
| 0.0000000002777778 MWh | Megawatt-hour |
| 0.7375621 ft·lbf | Foot-pound |
| 6,241,509,000,000 MeV | Megaelectronvolt |
| 0.2390057 cal | Calorie |
| 0.0002390057 kcal | Kilocalorie |
| 0.0009478171 BTU | British Thermal Unit |
Convert 1 Joule to other units
One joule (J) is equal to:
| 1 Joule equals | Unit |
|---|---|
| 1 N·m | Newton-metre |
| 0.001 kJ | Kilojoule |
| 0.000001 MJ | Megajoule |
| 0.0002777778 Wh | Watt-hour |
| 0.0000002777778 kWh | Kilowatt-hour |
| 0.0000000002777778 MWh | Megawatt-hour |
| 0.7375621 ft·lbf | Foot-pound |
| 6,241,509,000,000 MeV | Megaelectronvolt |
| 0.2390057 cal | Calorie |
| 0.0002390057 kcal | Kilocalorie |
| 0.0009478171 BTU | British Thermal Unit |
Tips for converting Newton-metre to Joule
- To go from newton-metre to joule, multiply by 1; to go back, divide by 1 (or multiply by 1).
- For a quick mental estimate, remember that 1 newton-metre ≈ 1 joule, so 10 newton-metre ≈ 10 joule.
- The converter above keeps full precision; the tables round for readability, so use the tool for exact figures.
- Both fields update live as you type — change either side to convert in that direction.
How to use this Newton-metre to Joule converter
Type a number into the Newton-metre field and the equivalent in Joule appears instantly — there is no “convert” button to press and nothing is sent to a server, so it works offline once the page has loaded and is safe for any data. You can also type into the Joule field to convert the other way (joule to newton-metre). Use the swap control to flip the two units, and copy the result with a single click. Because the calculation runs in your browser with full floating-point precision, the converter is more exact than the rounded figures shown in the reference chart above — use the chart for quick look-ups and the tool for precise work.
Accuracy and method
Every figure on this page — the formula, the worked examples, the conversion chart and the “convert to other units” tables — is computed from a single verified conversion factor (1 N·m = 1 J), never copied from a hand-typed lookup table that could drift. That factor is derived from each unit’s definition in terms of a common base unit, and an automated check re-verifies all of the site’s factors on every update, so the numbers here stay correct over time. This matters for newton-metre-to-joule conversions because a small rounding error in a published table compounds quickly at larger quantities; computing from the exact factor avoids that.
Sources
- BIPM — The International System of Units (SI Brochure) — the defining document for the SI, published by the International Bureau of Weights and Measures. It fixes the base unit that this conversion resolves to, which is why the factor here can be exact rather than approximate.
- NIST — Definitions of the SI base units — the US National Institute of Standards and Technology reference for the SI base units, used here as an independent cross-check on the base-unit definition.
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Frequently asked questions
- How many joule are in 1 newton-metre?
- 1 newton-metre = 1 joule (J). To convert any number of newton-metre to joule, multiply by 1.
- How do I convert newton-metre to joule?
- Multiply the number of newton-metre by 1. For example, 10 newton-metre = 10 × 1 = 10 joule, and 25 newton-metre = 25 joule.
- How many newton-metre are in 1 joule?
- 1 joule = 1 newton-metre. So to convert joule back to newton-metre, multiply by 1.
- What is the formula to convert newton-metre to joule?
- joule = newton-metre × 1. The reverse formula is newton-metre = joule × 1.
- How much is 100 newton-metre in joule?
- 100 newton-metre = 100 joule. (And 1000 newton-metre = 1,000 joule.)
- Which is bigger, a newton-metre or a joule?
- A newton-metre is larger: 1 newton-metre = 1 joule.
- Is this newton-metre to joule converter accurate?
- Yes — every value is computed from the exact 1 J per N·m factor (not rounded look-up tables), and the factors are re-verified automatically on every update.
- Can I convert joule to newton-metre too?
- Yes. The converter works both ways — enter a value in either field. 1 joule = 1 newton-metre.