Force Converter

How to use

1. 1Type a force value, or tap a preset such as Adult weight 700 N or Hand pull 25 lbf to load an example.
2. 2You can include the unit in the box, for example 25 lbf, 100 kgf, 2 kN, or 1000 dyn. Type MN for meganewtons and mN for millinewtons.
3. 3Pick the source unit under From unit. If the suffix you typed differs, use the one-click swap that appears to set it as the source.
4. 4Read the headline newtons, pounds-force, and equivalent mass, then scan the All units grid for every other unit at once.
5. 5Set the decimal places to control precision, then copy any single result or use Copy summary for all twelve units.
6. 6Use the mass to weight table to check a force against a familiar object. Everything runs in your browser with no upload.

About this tool

Force Converter changes a force value between twelve units used across physics, engineering, and everyday life, and shows every result at once so you can read or sanity check a spec without guessing. The newton (N) is the SI base unit of force, defined so that one newton accelerates a one kilogram mass at one metre per second squared (1 N = 1 kg*m/s^2). Every other unit here is defined as an exact or NIST conventional factor against the newton, and all conversions pass through newtons, so the math is auditable and consistent in both directions. The SI family covers the newton plus the kilonewton (kN) used for structural loads, the meganewton (MN) used for very large forces such as rocket thrust, and the millinewton (mN) used for small mechanisms and sensors. The CGS unit, the dyne, is included for older physics texts and surface-science work, where one newton equals exactly one hundred thousand dynes. The metric gravitational family covers the kilogram-force (kgf, also called the kilopond or kp), the gram-force (gf), and the tonne-force (tf), each defined as the weight of that mass under standard gravity, which is fixed exactly at g0 = 9.80665 m/s^2 by international agreement. The US and imperial family covers the pound-force (lbf), the dominant unit in American engineering, the ounce-force (ozf) at one sixteenth of a pound-force, the kip at one thousand pounds-force used in US structural design, and the poundal (pdl), the absolute foot-pound-second unit that accelerates a one pound mass at one foot per second squared. Because the pound is exactly 0.45359237 kg, the pound-force factor (1 lbf = 4.4482216152605 N) is exact within floating-point limits. The input box is suffix-aware, so you can paste a value straight from a spec sheet or a homework problem: type 25 lbf, 100 kgf, 2 kN, 50 gf, 1000 dyn, or even glued forms like 25lbf, and the tool reads the number. It treats a capital MN as meganewtons and a lowercase mN as millinewtons so the SI capitalisation rule is respected, and when the suffix you typed does not match the selected source unit it offers a one-click swap instead of silently misreading the value. A key feature is the mass to weight handling. Weight is a force, equal to mass times gravity, so a headline panel reports the mass on Earth that would weigh whatever force you entered, and a reference table turns familiar objects, from a small apple to a small car, into the force they exert under standard gravity in newtons and pounds-force. This is the distinction the tool keeps front and centre: a kilogram is a unit of mass, while a kilogram-force is the weight that mass has under gravity, and on the Moon the same mass weighs about a sixth as much. You can choose how many decimal places to show, copy any single result, or copy a full summary of all twelve units, and load presets for common forces. Useful for engineering students, physics homework, mechanical and structural engineers, machinists reading mixed metric and imperial specs, and anyone converting between newtons and pounds. Every calculation runs locally in your browser, so the values you type are never uploaded to a server.

Free to use. Works in your browser. No signup, no login.