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Everyday Calculators

The day-to-day tools: BMI, percentages, dates, fuel, electricity, scientific maths, conversions, and more. 51 calculators covering health, maths, time, conversion, daily NZ life, generators, and education.

Health and fitness

Body composition, energy expenditure, heart rate, and the everyday training maths.

Maths and statistics

Standard, scientific, graphing, fractions, and a full statistical-distribution toolset.

Standard

A full-screen four-function calculator that just works.

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Scientific

Trig, log, exponentials, and memory functions in a clean layout.

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Graphing

Plot any function or set of functions on a 2D coordinate plane.

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3D Graphing

Plot 3D surfaces from any z = f(x, y).

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Percentage

Percent change, percent of a number, increase / decrease, and reverse percent.

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Fraction

Add, subtract, multiply and divide fractions with full working.

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Right Angle Triangle

Solve a right triangle from any two known sides or one side and one angle.

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Trigonometry

Sine, cosine and tangent of any angle, plus inverse functions.

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Slope-Intercept Form

Convert between slope-intercept, point-slope and standard forms.

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Inequality

Solve linear and quadratic inequalities with a graphed solution set.

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Linear Regression

Best-fit line, slope, intercept, R squared from a paired data set.

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Logistic Regression

Logistic regression on binary outcome data.

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ANOVA

One-way analysis of variance across multiple groups.

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T-Test

Independent and paired t-tests with full p-value working.

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Chi-Square

Chi-square test of independence or goodness-of-fit.

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Probability

AND, OR, conditional and complement probability of any events.

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Binomial Distribution

P(X = k) and P(X <= k) for binomial(n, p).

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Poisson Distribution

Poisson probabilities for a given rate parameter.

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Hypergeometric Distribution

Sampling without replacement probabilities.

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Negative Binomial Distribution

Probability of k failures before the r-th success.

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Bessel Functions

Bessel functions of the first and second kind.

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Time, dates and timesheets

Date arithmetic, ages, time zones, and weekly timesheet hours.

Conversion

Length, area, volume, weight and the rest.

Daily NZ life

Fuel, power, RUC and the building-trade tools New Zealanders look up regularly.

Random and generators

Passwords, random numbers, and ways to fairly pick people or teams.

Education and miscellaneous

School and uni grade tools, plus a couple of long-tail favourites.