TOOLS / FREE TO USE
Know your numbers.
Plan your next step.
Start with simple estimates, understand what they mean, then use your real-world trend to decide what deserves attention next.
Free to use · No account required · Educational estimates
BODY SIZE SCREENING
BMI Calculator
Calculate body mass index from height and weight, with clear context about what BMI can—and cannot—tell you.Explore toolDAILY ENERGY ESTIMATE
TDEE Calculator
Estimate resting energy needs and total daily energy expenditure based on your body size, age and activity.Explore toolFAT-LOSS PLANNING
Calorie Target
Turn a TDEE estimate into a conservative, moderate, or more aggressive calorie-deficit planning target that you can compare with your real-world progress.Explore toolDAILY PROTEIN RANGE
Protein Target
Estimate a practical protein range from a reference weight and your current activity or muscle-support goal.Explore toolNUTRITION PLANNING
Macro Planner
Build a protein, carbohydrate, and fat split from daily calories and a protein target.Explore toolPROGRESS PLANNING
Goal Timeline
Explore an estimated timeline for your goal weight at a planning pace you choose.Explore toolFLUID PLANNING
Hydration Planner
Compare daily total-water reference values with a separate exercise-fluid range.Explore toolSUPPLEMENT EDUCATION
Creatine Guide
Get the evidence-based creatine monohydrate basics without turning it into a complicated protocol.Explore toolHOW TO USE PHYSIFORGE TOOLS
Start with the estimate.
Trust the trend.
Calculators are useful for choosing a starting range. They become more useful when you compare the estimate with several weeks of body-weight trend, food intake, training performance, hunger, recovery, and how consistently you can follow the plan.
Change one major variable at a time when possible. That makes the result easier to interpret.
Read practical Physiforge guides