Are the calculators free to use?

Yes, all calculators are free and require no registration or email address.

Do you save the data I enter?

No. Calculations are performed by the browser on your device, and the data never reaches our server.

Why do two calculators give different results for the same person?

Because they use different formulas. For metabolism and ideal body weight there are several recognized methods, and each is based on different studies and a different study group. A difference of a few percent is natural.

Does the combination calculator suggest which numbers to pick?

No. It only calculates how many bets a full system covers for the given number of selections and how much that costs. It doesn't point to numbers, evaluate sets, or suggest a stake amount.

Can I use the result in official documents?

No. The calculations are approximate and do not constitute a document or an opinion. Values for official purposes are determined by the relevant office or an authorized specialist.

Calculators

Here you'll find calculators that calculate one thing and do it properly. Each one shows not only the result, but also the formula it uses and explains what that number actually means. Nothing to install, no account needed.

Number game calculators

System Combinations Calculator

How many bets a full system covers and how much it costs.

Other calculators — maths

Arithmetic Mean

Enter numbers separated by commas and calculate the arithmetic mean online. The calculator will give you the s

Combinations, variations and permutations

Calculate the number of combinations, variations and permutations of n elements taken k at a time. Combinatori

Geometric mean

Calculate the geometric mean of any number of values. The n-th root of the product. Useful for rates of return

Nth Root Calculator

Compute the square root, cube root or a root of any degree. The calculator handles negative numbers for odd de

Percentage Calculator

Online percentage calculator: percentage of a number, share and percentage change, plus increasing or decreasi

Weighted Average

Calculate a weighted average: enter values and weights, one pair per line. The calculator will give the sum of

Other calculators — costs

Average Fuel Price Calculator

Calculate the average fuel price from your last three fill-ups. Check how much you really pay per liter, and c

Commute Costs to Work

Calculate how much your car commute to work costs. Enter the one-way distance, fuel consumption, fuel price an

Fuel Consumption Calculator

Calculate your car's average fuel consumption: enter the distance driven and litres filled. The calculator wil

Other calculators — health

BMI Calculator

Calculate your BMI based on body weight and height. See which range you fall into, learn the WHO scale, and fi

Broca Formula Ideal Weight Calculator

Calculate your ideal body weight using the Broca formula based on height and sex. Learn the history of this 18

Harris-Benedict BMR Calculator

Calculate your basal metabolic rate using the Harris-Benedict equation. Enter weight, height, age and gender t

Lorentz Ideal Body Weight Calculator

Calculate ideal body weight using the Lorentz formula based on height and sex. See how it differs from the Bro

Mifflin-St Jeor Calculator

Calculate your basal metabolic rate using the Mifflin-St Jeor formula. Enter your weight, height, age and sex

Potton Ideal Weight Calculator

Calculate ideal body weight with the Potton formula from height and sex. A historical formula with two version

WHR Calculator — waist to hip ratio

Calculate WHR, the ratio of waist circumference to hip circumference. Check whether your body shape is apple o

WHtR Calculator — waist to height

Calculate WHtR, the ratio of waist circumference to height. Learn the „waist below half your height” rule, che