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Read more →Weight Gain Percentage Calculator
Monitor your weight gain progress. Ideal for bulking phases, recovery, or pregnancy milestones.
Track Your Body Weight & Mass Gain
Quick Answer
Weight gain percentage tracks your body mass increase relative to your starting weight. It's a key metric for monitoring bulking progress, pregnancy health, or recovery, providing a better perspective than just pounds gained.
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Weight Gain Calculator
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Calculate Gain
- Enter your starting weight (lbs or kg).
- Enter your current weight.
- Calculate to see your percentage gain.
Gain Formula:
Gain % = ((Current Weight − Start Weight) ÷ Start Weight) × 100Tracking Body Weight Goals
Whether you are bulking for muscle, recovering weight after illness, or tracking a pregnancy, percentage provides better context than raw pounds.
Gaining 5 lbs is huge for a 100 lb person (5%) but minor for a 250 lb person (2%).
The Mechanics of Weight Gain
Simple Math:
To gain weight, you must consume more calories than you burn (caloric surplus). A surplus of ~3,500 calories roughly equals 1 lb of body weight.
Weight Examples
150 lbs to 165 lbs
Result: 10% gain
120 lbs to 132 lbs
Result: 10% gain
200 lbs to 210 lbs
Result: 5% gain
70 kg to 77 kg
Result: 10% gain
60 kg to 63 kg
Result: 5% gain
180 lbs to 170 lbs
Result: 5.56% loss
130 lbs to 145 lbs
Result: 11.54% gain
80 kg to 88 kg
Result: 10% gain
Baby 3kg to 6kg
Result: 100% gain
100 lbs to 105 lbs
Result: 5% gain
90 kg to 99 kg
Result: 10% gain
45 kg to 50 kg
Result: 11.11% gain
160 lbs to 176 lbs
Result: 10% gain
140 lbs to 154 lbs
Result: 10% gain
55 kg to 60 kg
Result: 9.09% gain
Weight FAQ
Do I need to enter lbs or kg?
The unit does not matter as long as you use the SAME unit for both start and current weight. The percentage result will be correct for both.
What is a healthy weight gain rate?
For muscle gain, 0.5 to 1.5% of body weight per month is often recommended. Gaining faster usually means gaining more fat.
Can I use this for weight loss?
Yes. If your Current Weight is lower than Start Weight, the calculator will show a negative percentage, indicating weight loss.
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