Education Tools

Free study and school calculators that run entirely in your browser — GPA, final and weighted grades, typing speed, reading time, fractions with steps, and a full statistics suite (p-values, confidence intervals, z-scores). No sign-up, nothing uploaded.

GPA Calculator

Calculate your GPA from course grades and credit hours on a 4.0, 4.3, 5.0 or 10-point scale.

Final Grade Calculator

Find out what score you need on the final exam to reach your desired course grade.

Weighted Grade Calculator

Compute your current course grade from category scores and syllabus weights, with letter grade and remaining-weight projection.

Test Grade Calculator (Easy Grader)

Enter total questions and how many are wrong or right to get the percentage, letter grade and a full EZ-grader chart.

Target GPA Planner

See what GPA you must average over your remaining credits to reach a target cumulative GPA.

Typing Speed Test (WPM)

Test your typing speed in 30, 60 or 120 seconds with live WPM and accuracy tracking.

Reading Time Calculator

Estimate how long a text takes to read silently or to deliver as a speech, from pasted text or a word count.

Words to Pages Converter

Convert a word count into estimated pages — or pages into words — for any font, size and line spacing.

Citation Generator (APA & MLA)

Format book, website and journal citations in APA 7 or MLA 9 — reference entry plus in-text citation.

Fraction Calculator with Steps

Add, subtract, multiply, divide and simplify fractions and mixed numbers with step-by-step working.

Significant Figures Calculator

Count the significant figures in a number and round it to any number of sig figs, with the rules explained.

Long Division Calculator with Steps

Divide two whole numbers with the full long-division layout, quotient, remainder, decimal and fraction forms.

P-value Calculator

Convert a z, t, chi-square or F test statistic into left-, right- and two-tailed p-values with a significance verdict.

Confidence Interval Calculator

Compute a confidence interval for a mean from its standard deviation and sample size, using the z or t distribution.

Z-Score Calculator

Convert a raw value to a z-score (or back) and see its percentile and tail probability on the normal curve.

Sample Size Calculator

Find the survey sample size needed for a chosen confidence level and margin of error, with finite-population correction.

Chi-Square Test Calculator

Run a chi-square test of independence on a contingency table: χ² statistic, degrees of freedom and p-value.

Linear Regression Calculator

Find the least-squares regression line y = a + b·x from paired data, with slope, intercept, r, r-squared and predictions.

Correlation Coefficient Calculator

Compute the Pearson correlation coefficient r between two data sets, with r-squared, covariance and a strength label.

Probability Calculator

Calculate the probability of two independent events: A and B, A or B, neither, not A, and at least one in n trials.

Normal Distribution Calculator

Compute z-scores and normal distribution probabilities: P(X ≤ x), P(X ≥ x), the area between two values, and the density at x.

Binomial Distribution Calculator

Compute binomial probabilities P(X = k), P(X ≤ k) and P(X ≥ k) for n trials with success probability p, plus the mean and standard deviation.

Percentile Calculator

Find the value at a given percentile or the percentile rank of a value, plus quartiles Q1, median, Q3, min and max.

Multiplication Table Generator

Generate a times table for a single number or a full multiplication grid, ready to read, copy or print, all in your browser.

Two-Sample t-Test Calculator

Run a one-sample, paired or two-sample t-test from raw data or summary stats, with the t-statistic, degrees of freedom and two-tailed p-value.

One-Way ANOVA Calculator (F-Test)

Compare the means of 3+ groups with a one-way ANOVA: full SS, df, MS and F table, the F-distribution p-value and eta-squared.

Poisson Distribution Calculator

Exact, cumulative and tail Poisson probabilities for a mean rate λ and count k, plus the mean, variance and standard deviation.

Cohen's d Effect Size Calculator

Compute Cohen's d and Hedges' g from two groups' means, SDs and sizes, or from raw data, with small/medium/large bands.

Odds Ratio & Relative Risk Calculator (2×2)

From a 2×2 table get the odds ratio and relative risk with 95% CIs, plus risk difference, NNT and a p-value.

Confidence Interval for a Proportion Calculator

Wald and Wilson-score confidence intervals and the margin of error for a sample proportion x/n at 90%, 95% or 99%.

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