Calculate cycling average speed.
CyclingOpen
Power to Weight Ratio Calculator
Quick answer
If power is 250 W and weight is 70 kg, the power/weight is 3.57 W/kg.
Enter your values
0 W3,000 W
W
kg
Power/weight
3.57W/kg
Calculated directly from the values you entered above.
More in Cycling
All Sports calculatorsCalculate running pace.
RunningOpenCalculate race time prediction.
RunningOpenCalculate cricket batting strike rate.
CricketOpenCalculate cricket bowling economy.
CricketOpenCalculate cricket run rate.
CricketOpen
See how the result changes
Each table re-runs this calculator with one value changed and everything else left as it is.
Power/weight by power
If power goes from 250 W to 375 W, power/weight changes from 3.57 W/kg to 5.36 W/kg (+50%).
| Power | Power/weight |
|---|---|
| 125 W | 1.79 W/kg |
| 188 W | 2.69 W/kg |
| 250 Wstart | 3.57 W/kg |
| 375 W | 5.36 W/kg |
| 500 W | 7.14 W/kg |
Power/weight by weight
If weight goes from 70 kg to 105 kg, power/weight changes from 3.57 W/kg to 2.38 W/kg (−33%).
| Weight | Power/weight |
|---|---|
| 35 kg | 7.14 W/kg |
| 52.5 kg | 4.76 W/kg |
| 70 kgstart | 3.57 W/kg |
| 105 kg | 2.38 W/kg |
| 140 kg | 1.79 W/kg |
SPORTS GUIDE
A quick guide to Power to Weight Ratio
Use it to get an accurate power/weight in seconds — free, with no sign-up.
Instant results
See your power/weight the moment you enter your numbers.
Free, no sign-up
Every calculator here is free to use, with no account required.
Accurate & transparent
The same standard formula runs on our server for every calculation.
How to Use the Power to Weight Ratio Calculator
1
Enter Power
Provide your power, in W.
2
Enter Weight
Provide your weight, in kg.
3
View Your Results
Get your power/weight instantly, calculated on our server.
What is Power to Weight Ratio?
This sports tool works out your power/weight instantly, so you don't have to do the math by hand.
“One quick calculation, so you always know your power/weight before you decide.”
What Affects Your Power/weight
Your power/weight depends on the values below.
Power
Changing your power changes your power/weight.
Weight
Changing your weight changes your power/weight.
Example Result
Here's what you can expect from a power to weight ratio calculation:
- Power
- 250 W
- Weight
- 70 kg
- Power/weight
- 3.57 W/kg
Frequently Asked Questions
- How does power affect power/weight?
- If power goes from 250 W to 375 W, power/weight changes from 3.57 W/kg to 5.36 W/kg (+50%).
- How does weight affect power/weight?
- If weight goes from 70 kg to 105 kg, power/weight changes from 3.57 W/kg to 2.38 W/kg (−33%).
- How to calculate power to weight ratio?
- Fill in power and weight in the Power to Weight Ratio Calculator above and your power/weight is calculated instantly. Change any value to see how the result responds.
- What does an example power to weight ratio calculation look like?
- If power is 250 W and weight is 70 kg, the power/weight is 3.57 W/kg.
- Is this calculator free to use?
- Yes — every calculator on this site is completely free, with no sign-up or account required.
- How accurate is this calculator?
- It uses the standard formula and calculates on our server for every request, so results are precise for the values you enter.
- Is my data saved anywhere?
- No. Nothing you enter is stored or sent anywhere unless you choose to share a link with your values included.
Customize this calculator
Pick a look, copy the code, and this Power to Weight Ratio calculator — with its inputs and results — runs on your own website.
Theme color
Match your brand's colors
Corner style
Sharp, soft or fully rounded
Widget width
Compact, standard or full width
Live preview
Full widthThe same inputs, result and chart as the calculator above, styled with your choices.
yoursite.com