🚴 Cycling Power-to-Weight Calculator
Enter your FTP (or any power figure) and body weight to see your power-to-weight ratio in W/kg, where it sits on the recreational-to-pro scale, and — with a bike weight — your system W/kg for climbing.
Best measured at FTP — the highest power you can hold for about an hour.
🧮 Calculate Your W/kg
🚴 Your power-to-weight
| Recreational | Under 2.5 W/kg |
| Enthusiast | 2.5–3.0 W/kg |
| Competitive | 3.0–4.0 W/kg |
| Very strong | 4.0–5.0 W/kg |
| Elite / Pro | 5.0+ W/kg |
Why watts per kilogram matter
Two riders putting out the same 250 watts don't climb at the same speed — the lighter one does. That's why cyclists talk in watts per kilogram rather than raw watts: it's the number that decides who gets dropped on the climb and who rides away.
This calculator divides your power by your weight, sorts the result into a plain-English category, and can add your bike's weight to show the system W/kg that gravity actually sees. Read exactly how the math works in the FAQ below.
❓ Frequently Asked Questions
What is a good power-to-weight ratio for cycling?
Power-to-weight is your sustainable power divided by your weight, in watts per kilogram (W/kg), and it's usually quoted at FTP. As a rough guide: under 2.5 W/kg is recreational, 2.5–3 is a fit enthusiast, 3–4 is competitive club-racing territory, 4–5 is very strong, and 5+ W/kg at FTP is Category 1 and professional level. Where you land depends on the effort duration too — riders can hold far higher W/kg for a 5-minute climb than for a full hour.
Why is power-to-weight measured at FTP?
FTP — Functional Threshold Power — is the highest power you can hold for roughly an hour, and it's the standard reference for endurance cycling because most climbs and hard sustained efforts sit around that intensity. Dividing FTP by your weight gives a number that predicts real-world climbing and time-trial performance far better than raw watts alone, since a lighter rider needs less power to move the same speed uphill.
What is system power-to-weight (rider + bike)?
On a climb you're lifting yourself and the bike against gravity, so the honest figure divides your power by the combined weight of rider plus bike (plus kit, bottles and anything else you carry). Enter a bike weight and the calculator shows this 'system' W/kg alongside your rider-only figure. It's always lower, and it's why shaving weight off the bike matters most when the road points up.
How can I improve my power-to-weight ratio?
There are two levers: raise power or lower weight. Structured training — threshold intervals, VO2 max work and consistent volume — raises FTP, while sensible body-composition changes lower the denominator. Chasing weight loss too aggressively can cost you power, so most riders make the biggest gains by building durable fitness first. Track W/kg over a season rather than day to day.