Force Converter

Type a number, tell it which unit you've got, and this force converter lays that force out in all seven units at the same time: newtons, kilonewtons, pound-force, kilogram-force, dyne, ounce-force, and poundal. Free, instant, and it runs entirely in your browser.

The real advantage shows up the moment you need the same force in more than one unit. Most force converters make you choose a "from" unit and a "to" unit, then hand back one lonely number. That's fine right up until you need it three ways, newtons for the physics answer, lbf for the torque spec, and kgf because the old datasheet quotes it that way. On a from/to tool you run that conversion three separate times. This one shows every unit at once, live, the instant you type, so you read all three off one screen. Each row has its own copy button, and there's a shareable link that reopens the exact conversion with the value and unit already filled in, so you can paste it to a coworker instead of retyping the whole thing into a message.

One honest limit, right at the top, because it's the mistake people genuinely make here. This converts force into force. It does not turn a mass into a force. If your bathroom scale reads 70 kg and you want that in newtons, 70 is a mass, and you multiply by gravity (about 9.80665) to get the weight, which lands near 687 N. Type 70 straight in as though it were already a force and you get a tidy wrong answer that looks perfectly reasonable.

1. Enter your value in the Value box. Whole number, decimal, or scientific notation like 2.5e3, all read fine.
2. Pick the unit you have in the From dropdown. That's the only unit you have to choose.
3. Read the table. Every one of the seven units shows your force converted, and it updates the moment you type or switch the From unit. No convert button to hunt for.
4. Copy any row with the copy link on the right. It grabs exactly the value shown, ready to paste.
5. Copy a shareable link to reopen this exact conversion later or send it to someone else. The value and the unit ride along inside the link.

There's no separate "to" unit and no swap button, because you don't need one. The answer in every unit is already sitting on screen.

Every conversion here routes through the newton, the SI unit of force. Your input becomes newtons first, then gets turned back out into each of the other units, which is how all seven columns come from a single number.

If you're converting force at all, odds are decent you're wrestling with one of these two, and between them they cause more confusion than the other five units combined. Both are weight units pretending to be force units, and that's on purpose.

A kilogram-force (kgf) is defined as the weight of one kilogram of mass under standard gravity, which is exactly 9.80665 newtons. A pound-force (lbf) is the weight of one pound of mass under that same standard gravity, and it works out to about 4.4482 newtons. Both definitions are set up to do one thing. They let you talk about a force using the exact same number as the mass. A 5 kg object weighs 5 kgf, a 10 lb object weighs 10 lbf, no mental math required. Which is precisely why shop floors, tire charts, and old European spec sheets leaned on them for decades.

Physicists never warmed to them for that very reason, the units mix mass and force back together, and keeping those two apart is the whole reason the newton exists. Imperial makes it worse by reusing one word, "pound," for both. When a recipe says a pound of butter, that's mass. When a bolt spec says 150 lbf, that's force. Same word, two different physical things, and in real engineering math the two split apart by a factor of about 32 the instant you mix them up.

For this tool the rule is short. The kgf and lbf rows are force. If what you actually have is a mass (kilograms of flour, pounds of butter, your own weight on a scale), that number belongs in a weight converter first, or you multiply it by gravity yourself. And the kilopond (kp) you'll spot on older European gear is just another name for the kilogram-force, same unit, same 9.80665 N.

Two small habits make this noticeably faster than a plain converter.

Use it as a gut check. Type your number, run your eye down the column, and if one value is wildly off from what you expected, you almost certainly picked the wrong From unit. A single answer can be confidently wrong. Seeing all seven side by side makes an off-by-a-thousand slip obvious in about a second.

Lean on the link for anything collaborative. In a design review, or arguing a spec back and forth over chat, set the value and unit, copy the shareable link, and drop it in. Whoever opens it lands on the identical conversion you're staring at, no screenshots and no "type 4500 and pick kilonewtons."

As for the units you'll rarely touch, they sit on the list so a legacy document or an exam question can't strand you. The dyne is a CGS holdover worth one hundred-thousandth of a newton, still quoted for surface tension in dynes per centimeter. Ounce-force turns up on small actuators, relays, and delicate spring gauges. The poundal is a near-extinct British force unit you'll mostly meet in old textbooks. You won't reach for these often, but when a spec sheet does throw one at you, shifting the decimal by hand is exactly where a slip creeps in.