How to Reach 4 Watts per Kg in Cycling
Reaching 4 watts per kilogram (4 W/kg) is one of the most popular milestones in amateur cycling. It typically indicates strong competitive fitness and the ability to perform well in races, sportives and fast group rides.
In this guide you'll learn what 4 W/kg means, how it compares to other cyclists, and the two main strategies to get there — increasing FTP and managing body weight.
What Does 4 Watts per Kg Mean?
Your power-to-weight ratio is calculated by dividing your Functional Threshold Power (FTP) by your body weight. Reaching 4 W/kg means this number equals four or higher.
Here's what that looks like at different body weights:
| Body weight | FTP needed for 4 W/kg |
|---|---|
| 60 kg | 240 W |
| 65 kg | 260 W |
| 70 kg | 280 W |
| 75 kg | 300 W |
| 80 kg | 320 W |
Is 4 Watts per Kg Good?
Yes — 4 W/kg places you solidly in the competitive amateur range. You'll be able to hold your own in most amateur races and keep up on challenging group rides. It's a strong level, but still well below professional cyclists.
| Level | Typical W/kg |
|---|---|
| Beginner | 2.0 – 2.5 |
| Recreational | 2.5 – 3.2 |
| Strong amateur | 3.2 – 4.0 |
| Competitive amateur | 4.0 – 4.8 |
| Elite / professional | 5.0+ |
Calculate Your Current W/kg
Before planning your path to 4 W/kg, you need to know where you stand. If you know your FTP and body weight, the calculation takes seconds.
FTP: 265 W
Weight: 74 kg
W/kg = 265 ÷ 74 = 3.58
This rider needs to either increase FTP, reduce weight, or a combination of both to reach 4.0 W/kg. Use our race weight calculator to see how different weight and FTP scenarios affect your W/kg.
Two Ways to Reach 4 W/kg
There are only two levers: increase your power or reduce your weight. Most cyclists benefit from working on both simultaneously.
1. Increase Your FTP
Structured interval training is the most effective way to raise your threshold power. Key workout types include:
- Sweet spot intervals (88–94% of FTP) for building aerobic capacity
- Threshold intervals (95–105% of FTP) for pushing your ceiling higher
- VO2max intervals (106–120% of FTP) for peak-phase intensity
- Long endurance rides to build your aerobic base
Not sure what these zones mean? Our guide on cycling power zones explained covers all seven Coggan zones and how to use them in your training.
2. Reduce Body Weight
Small weight reductions can have a meaningful impact on W/kg — but only if you maintain your power output. Losing weight too aggressively often leads to reduced FTP, which defeats the purpose. For a detailed breakdown of how to combine nutrition timing with training phases, see our guide on how to increase watts per kg.
| Scenario | FTP | Weight | W/kg |
|---|---|---|---|
| Starting point | 265 W | 74 kg | 3.58 |
| FTP increase only | 296 W | 74 kg | 4.00 |
| Weight loss only | 265 W | 66 kg | 4.02 |
| Combined approach | 280 W | 70 kg | 4.00 |
The combined approach is usually the most realistic and sustainable path.
Training Strategy
A typical training progression to reach 4 W/kg follows a periodised approach over 12–24 weeks:
Base phase (4–8 weeks)
Build aerobic capacity with endurance rides and sweet spot work. This is also the best time to address body composition.
Build phase (4–8 weeks)
Add threshold and VO2max intervals. Training volume may drop slightly as intensity increases.
Peak phase (2–4 weeks)
Sharpen fitness with high-intensity work, then taper before your target event or FTP test.
Consistency matters more than any single workout. Training 3–5 days per week with structured sessions will produce better results than sporadic high-volume weeks.
How Long Does It Take?
The time required depends on where you're starting from, your training consistency, and how much room you have for body composition improvement.
| Starting W/kg | Typical time to 4 W/kg |
|---|---|
| 3.0 | 6 – 12 months |
| 3.3 | 4 – 8 months |
| 3.6 | 2 – 4 months |
These are rough estimates. Individual results vary based on training history, genetics, recovery and nutrition.
Plan Your Path to 4 W/kg
Instead of guessing, create a structured plan that combines periodised training with calorie targets matched to your workload. Set your FTP goal, your target weight, and get a daily plan that tells you exactly what to do.
Lean Race Plan generates a personalised training and nutrition plan based on your current fitness, available hours, and target event — so you can track your progress toward 4 W/kg week by week.
Generate your Lean Race Plan →Frequently Asked Questions
Is 4 watts per kg elite?
No. 4 W/kg is strong amateur level. Professional cyclists typically sustain 5.5–6.5 W/kg. But for most recreational and amateur riders, reaching 4 W/kg is a significant achievement that opens up competitive racing.
Should I lose weight or increase FTP first?
Both are effective, but most coaches recommend prioritising FTP gains through structured training. Weight loss should happen gradually during base training phases — not during high-intensity blocks where your body needs adequate fuel to adapt and recover.
Can beginners reach 4 W/kg?
Yes, many recreational cyclists can reach 4 W/kg with consistent structured training over 1–2 years. Starting fitness, age and genetics play a role, but the milestone is achievable for a wide range of riders willing to train consistently.
Is FTP the same as watts per kg?
No. FTP is your absolute threshold power in watts. Watts per kg divides that power by your body weight, giving a ratio that better predicts climbing and racing performance. Two riders can have the same FTP but very different W/kg values.