Math - 4 min read
How to calculate percentages without overthinking it
A quick guide to percentage formulas, parts of a total, increases and everyday examples.
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Guides for everyday calculations
Clear explanations, practical formulas and examples that make each calculator easier to use.
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Practical context for the calculators published in English.
Converters · 5 min read
How to convert kilometers to miles in Excel and Google Sheets
Learn how to convert a column of kilometers to miles in Excel or Google Sheets with formulas, rounding and reverse conversion.
Read articleConverters · 6 min read
Statute mile vs. nautical mile: differences and conversions
Learn the difference between statute and nautical miles, their kilometer equivalents and when each unit is used.
Read articleConverters · 7 min read
Pace per kilometer vs. pace per mile: how to convert
Convert running pace between minutes per kilometer and minutes per mile with formulas, examples and a quick reference table.
Read articleConverters · 6 min read
Kilometers vs. miles: differences, uses and conversions
Learn the difference between kilometers and miles, their symbols, where they are used and how to convert between them.
Read articleConverters · 5 min read
Kilometers to miles table: conversions from 1 to 100 km
Look up common kilometer and mile conversions, including road distances, 5K, 10K, half marathon and marathon distances.
Read articleConverters · 6 min read
How to convert kilometers to miles: formula and examples
Learn how to convert kilometers to miles and miles to kilometers with the formula, worked examples and a distance calculator.
Read articleHealth · 5 min read
TDEE and macros: how they fit together
Move from estimated daily calories to protein, fat and carbohydrate targets without confusing energy with macronutrients.
Read articleHealth · 5 min read
The Mifflin–St Jeor equation: estimating resting energy
Learn the Mifflin–St Jeor equations, work through an example and convert resting energy into an estimated TDEE.
Read articleHealth · 5 min read
Why your weight may not change as expected at your TDEE
Understand maintenance, normal scale fluctuations and how to refine a TDEE estimate after observing a consistent trend.
Read articleHealth · 5 min read
How many calories should you eat to gain weight?
Estimate a cautious calorie surplus from your TDEE and adjust it according to your weight and performance trends.
Read articleHealth · 5 min read
How many calories should you eat to lose weight?
Start with your TDEE, choose a moderate calorie deficit and assess progress over several weeks rather than days.
Read articleHealth · 4 min read
BMR vs TDEE: the difference and when to use each
Distinguish basal metabolic rate from total daily energy expenditure and choose the right estimate for daily calories.
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