FREE Calculator
Weekly Weight-Loss Projection Calculator
Forecast your weight week by week using a fixed or percentage weekly rate, with projected dates for each week ahead.
Weight-Loss Projection
Set your starting weight and weekly rate to build a projection
Week-by-Week Projection
Set your parameters to build a projection
Week-by-week weight and dates
Fixed vs Percentage Rate
Fixed Rate
Subtracts the same amount each week: W(n) = start − rate × n. Simple and predictable, typical of calorie-deficit plans.
Percentage Rate
Loses a percentage of current weight each week: W(n) = start × (1 − p/100)ⁿ. Slows gradually as weight drops, closer to real-world patterns.
Reference: Many guidelines recommend losing about 0.5–1% of bodyweight per week for sustainable fat loss.
Getting Realistic Projections
- ·Weigh yourself at the same time each week, ideally in the morning, for consistent tracking.
- ·Expect plateaus — week-to-week loss is rarely linear in practice.
- ·Adjust the rate as your actual results come in rather than forcing the original projection.
Tip: Combine projections with a GLP-1 or peptide protocol timeline to set realistic expectations.
Important Note
This projection is a mathematical estimate, not a guarantee or medical advice. Actual weight change depends on adherence, metabolism, hormones, and many other factors. Always work with a qualified healthcare professional.