Weight Loss Calculators & Guides
Every tool and article on HonestSlim — organised by what you're trying to find out. Unlike other calculators, all of these show you a realistic range of outcomes rather than a single made-up date.
Calculators
Main calculator
Full fan chart — 5,000 simulations with your own stats
Calculator in kg
Metric calculator with goal-specific timelines
Calculator in lbs
Imperial calculator with goal-specific timelines
Guides
How long does weight loss take?
Reference timelines, the three phases, and why ranges beat dates
Realistic weekly rate
Safe rates by starting weight, week-by-week breakdown
Weight loss plateaus
Why the scale stalls, metabolic adaptation, what to do
Calorie deficit & timeline
How deficit size translates to weeks, with TDEE flow explained
Timelines by goal — kg
How long to lose 5 kg?
Live simulation · adherence comparison table
How long to lose 10 kg?
Live simulation · adherence comparison table
How long to lose 15 kg?
Live simulation · plateau expectations
How long to lose 20 kg?
Live simulation · metabolic adaptation over 6–12 months
Timelines by goal — lbs
How long to lose 10 lbs?
Live simulation · adherence comparison table
How long to lose 20 lbs?
Live simulation · adherence comparison table
How long to lose 30 lbs?
Live simulation · why adherence is everything at this scale
How long to lose 50 lbs?
Live simulation · honest truth about a year-long goal
All simulations run 5,000 scenarios in your browser — free, no signup, no data collected.
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