Free Tool

W/KG CALCULATOR

Enter your FTP and body weight. See where you stand.

FTP (WATTS)

WEIGHT (KG)

METHODOLOGY

Formula: W/kg = FTP (watts) ÷ Body weight (kg). FTP should be determined from a 20-minute all-out test (×0.95) or ramp test.

Benchmarks:Based on published data from Coggan's power profiling, adjusted for real-world amateur and masters populations. Professional benchmarks from World Tour race data.

Limitations: W/kg predicts climbing speed but not flat performance (where absolute watts matter more). Body weight should be measured consistently (morning, before eating). W/kg varies with hydration and time of day.

Last updated: April 2026 · Tool version 1.0

Quick answer

Enter your FTP in watts and body weight in kilograms. The calculator divides one by the other and returns your W/kg, plus where you sit across eight benchmark bands from beginner (under 1.5) to professional (5.0+).

WHAT IT DOES

W/kg is the single best predictor of climbing speed and overall road cycling performance. This calculator gives you the number and tells you which performance band you're in — without the cycling forum noise that usually comes with that question.

WHO IT'S FOR

→Riders comparing themselves to event categories or peer groups
→Cyclists deciding whether to chase more power or less weight
→Anyone planning a bucket-list event with published category cut-offs
→Athletes who want a single fitness number that travels across all rides

HOW IT WORKS

W/kg = FTP (watts) ÷ Body weight (kg). FTP should come from a 20-minute test (×0.95) or a ramp test. Body weight should be measured first thing in the morning, after the bathroom, before eating or drinking — and averaged across 3-4 consecutive days to remove noise.

01
Determine FTP
Complete a 20-minute all-out test on a power meter or smart trainer. Multiply average power by 0.95. Ramp tests on Zwift / TrainerRoad are an acceptable alternative.
02
Weigh consistently
Record morning weight on 3-4 consecutive days. Average the result. This is the number to use — not your weight after a long ride or after a heavy meal.
03
Divide watts by kilograms
Example: 260W / 72kg = 3.61 W/kg. The calculator does this and matches you to the closest benchmark band.
04
Decide which lever to pull
If you're already at competitive amateur power but holding extra weight, body composition is the fastest gain. If your power is well below your weight class, train more — don't diet.

EXAMPLE CALCULATIONS

Competitive amateur

· FTP: 280W
· Weight: 72kg

3.89 W/kg — strong amateur band. Climbing target for a regional gran fondo podium.

Comeback rider

· FTP: 200W
· Weight: 88kg

2.27 W/kg — recreational band. The fastest gain is usually 3-4 kg of body composition rather than 30W of FTP.

LIMITATIONS

W/kg predicts climbing speed but not flat performance — on flat roads, absolute watts and aerodynamics dominate. Body weight changes daily with hydration and food; rely on a 7-day rolling average. Benchmarks are population-based — being a band below "competitive" doesn't mean you're slow at your event.

When to see a coach

If your W/kg has been flat for 6+ months despite consistent training, the issue is rarely the number — it's how your training week is structured. Coaching is about how you spend your hours, not how you measure them.

FREQUENTLY ASKED QUESTIONS

What is a good W/kg for cycling?+

Recreational: 1.5-2.5 W/kg. Fitness cyclist: 2.5-3.0. Competitive amateur: 3.0-3.5. Strong amateur: 3.5-4.0. Elite: 4.0-4.5. Semi-pro: 4.5-5.0. Professional: 5.0+. Grand Tour climbers: 6.0+ on a 20-minute climb.

How do I improve my W/kg?+

Two levers: increase FTP through structured training (polarised model, threshold intervals, consistency) or decrease body weight through the fuel-for-the-work-required framework. Most amateurs improve fastest through body composition changes. Riders already at low body fat usually need to train more, not eat less.

Does W/kg matter on flat roads?+

Less than on climbs. On flat roads, absolute watts and aerodynamic drag dominate finishing speed. A 90kg rider with 320W FTP will often beat a 65kg rider with 240W on the flat, even though the lighter rider has the better W/kg. W/kg is the king metric for climbing and overall stage-race performance.

What's a realistic W/kg gain in one year?+

A consistent amateur can typically gain 0.3-0.5 W/kg in a year through structured training and modest body-composition work. Beginners can gain more (1.0+) in their first year. Riders already at 4.5+ usually plateau and need very specific training and recovery to add another 0.1-0.2.