Weight loss calculator

years
The formula is meant for adults.
ft
in
lb
lb
Values from the FAO/WHO/UNU 2004 report. Workouts count as part of daily life.

Result

Goal weight reached on
17 April 2027
Duration
About 26 weeks (184 days, roughly 6.0 months)
Daily calorie intake
Eat about 1,835 kcal per day: starting energy needs 2,335 kcal minus a 500 kcal deficit.
Simple calculation for comparison
Simple calculation with a constant deficit: 154 days. With falling energy needs it takes 30 days longer.
Expected progress
WhenDateWeight
Week 412 November 2026172.1 lb
Week 810 December 2026168.4 lb
Week 127 January 2027164.9 lb
Week 164 February 2027161.6 lb
Week 204 March 2027158.5 lb
Week 241 April 2027155.5 lb
Goal reached17 April 2027154.0 lb
The date is a calculated estimate: water, muscle and the body’s adaptation make the pace vary. A slow, steady pace is usually easier to keep up; larger losses belong under medical supervision. The rule of thumb is 7,700 kcal per kilogram of body weight; it is only approximate. The result is an estimate and does not replace medical or dietetic advice.