Cycling Power-to-Weight Calculator
W/kg = sustained power (W) / body weight (kg). Maps to USAC category and Coggan rider type.
Result
Power-to-weight
3.33 W/kg
Good (Cat 4)
- Power250 W
- Weight75 kg
- Weight (kg)75.00 kg
- W/kg3.33
- Coggan tierGood (Cat 4)
Step-by-step
- Convert weight if needed: 75 kg = 75.00 kg.
- W/kg = 250 / 75.00 = 3.33.
- Map to Coggan tier: Good (Cat 4).
How to use this calculator
- Use FTP or 20-min average power, not 5-min peak.
- Pick the matching weight unit.
- Compare to Coggan tier — and to peers, not pros.
- Track over months, not single rides.
About this calculator
On flat ground at ~25 mph, raw watts win. On hills, watts per kilogram wins — which is why grand-tour climbers weigh 60 kg and grind out 6 W/kg up alpine passes. Andy Coggan's tables map 1-hour W/kg to a USAC race category: 5.6+ is world tour, 4.8+ Cat 1, 4.0+ Cat 2, 3.4+ Cat 3, 2.8+ Cat 4, 2.2+ Cat 5. Sprint W/kg (5-second peak) runs ~50% higher than FTP W/kg — track sprinters often hit 22-25 W/kg.
Frequently asked
FTP is the highest 1-hour sustainable power — that's what wins climbs. Max power is anaerobic, lasts seconds, and doesn't correlate with race results.
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