Calculators that show their work.
Quick, accurate tools for health, money, math and the everyday. Each one prints the formula it used and draws the answer as a chart you can read at a glance.
Coffee, annualised
A $4.50 takeaway coffee, so many times a week.
Mounjaro, Wegovy and Ozempic click calculators
Turn a dose into clicks and millilitres on the exact pen you are holding, with every figure checked against the UK product leaflets.
Pick a shelf, find your number
Calories & Nutrition
Daily needs, deficits, macros and every unit the label uses.
Browse → Health & Fitness · 9Calories in Food & Drink
What is actually in the food on your plate and the drink in your hand.
Browse → Health & Fitness · 8Exercise & Training
Pace, burn, heart-rate zones and gym numbers that transfer between machines.
Browse → Health & Fitness · 8Body & Weight
BMI, body fat and healthy-range checks using the published formulas.
Browse → Health & Fitness · 2Weight-Loss Injections
Mounjaro, Wegovy and Ozempic pens: clicks, millilitres and cost per dose, from the UK leaflets.
Browse → Health & Fitness · 6Pregnancy & Fertility
Due dates, fertile windows and week-by-week milestones.
Browse → Health & Fitness · 3Medical
Clinical formulas, stated plainly and sourced.
Browse → Money & Finance · 16Mortgages & Property
Repayments, equity, affordability and the rent-or-buy question.
Browse → Money & Finance · 17Loans & Debt
True costs, payoff orders and what the APR really means.
Browse → Money & Finance · 17Saving & Investing
Compound growth, returns and what a pound today is worth tomorrow.
Browse → Money & Finance · 9Retirement & Pensions
Contribution limits, drawdown and what your later years will pay.
Browse → Money & Finance · 5Tax
Brackets, thresholds and take-home, with the tax year stated on the page.
Browse → Money & Finance · 5Pay & Business
Salaries, margins and the numbers behind a quote.
Browse → Money & Finance · 3Spending
Budgets, discounts and what the sale price actually saves you.
Browse → Math & Numbers · 9Arithmetic & Percentages
Fractions, percentages and long division with the working shown.
Browse → Math & Numbers · 5Powers, Roots & Logs
Exponents, radicals and logarithms to any base.
Browse → Math & Numbers · 9Geometry
Areas, volumes, triangles and the theorems behind them.
Browse → Math & Numbers · 10Algebra & Number Theory
Equations, factors, primes and number bases.
Browse → Math & Numbers · 11Statistics & Probability
Averages, spread, confidence and the odds of it happening.
Browse → Home & Garden · 14Garden & Landscaping
Turf, fencing, decking and how much the outdoor job really takes.
Browse → Home & Garden · 16Building Materials
Bricks, concrete, plaster and aggregates in bags and tonnes, not guesses.
Browse → Home & Garden · 10Inside the Home
Paint, wallpaper, flooring and heating, with wastage counted honestly.
Browse → Home & Garden · 8Big Jobs & Projects
Skips, moves and installations that need sizing before they need pricing.
Browse → Everyday & Conversions · 10Time & Date
Ages, durations, deadlines and what day it lands on.
Browse → Everyday & Conversions · 5Driving & Travel
Fuel money, mileage claims and what the trip really costs.
Browse → Everyday & Conversions · 7Electrics & Tech
Ohms law, running costs, subnets and strong passwords.
Browse → Everyday & Conversions · 3Weather
What the temperature actually feels like out there.
Browse → Everyday & Conversions · 6Science & Units
Conversions, density, molar masses and speed.
Browse → Everyday & Conversions · 3School & Sport
Grades, GPAs and your golf handicap, scored properly.
Browse → Everyday & Conversions · 7Handy Tools
Converters and one-off answers that come up all the time.
Browse →Plan a calorie deficit you can actually keep
Give it your stats and a goal, and the Calorie Deficit Calculator hands back a daily calorie target, the date you reach your goal weight and a chart of the whole road between here and there.
- A projected weight chart with your goal date marked on it
- Plain warnings when the pace is too hot to hold
- A macro split and a weekly plan you can print
Which calculator should we build next?
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