Everyday Calculators

GPA, grades, random numbers, passwords, tips, and other practical tools for daily life.

Compute your GPA on the 4.0 scale from letter grades and credit hours.

Grade Calculator

Find your weighted course grade and the score you need on the final exam.

Calculate the tip, total bill, and per-person share for any tip percentage.

Fuel Cost Calculator

Estimate the gas cost of any trip from distance, MPG, and fuel price.

Square Footage Calculator

Find the square footage of any room or area, with unit conversions and cost.

Love Calculator

Enter two names and get a playful love compatibility percentage.

Random Number Generator

Generate random numbers in any range — for raffles, games, and sampling.

Roll virtual dice from d4 to d100 — single dice or full handfuls with totals.

Password Generator

Generate strong random passwords with custom length and character sets.

Scientific Calculator

Full scientific calculator with trig, logs, powers, roots, and factorial.

Gematria Calculator

Decode any word or name into English ordinal, full reduction, and English (A=6) gematria values.

Puppy Weight Calculator

Estimate your puppy’s adult weight from its current weight, age, and breed size.

Turn your original and final gravity readings into ABV, attenuation, and calories.

Rounding Calculator

Round any number to a chosen place value or significant figures, in four rounding modes.

AP Score Calculator

Estimate your 1–5 AP exam score from practice-test multiple-choice and FRQ points.

SAT Score Calculator

Convert digital SAT raw scores into section scores, a 400–1600 total, and a percentile.

About our everyday calculators

These are the calculators for questions that come up in real life rather than in a textbook. What do I need on the final to keep my A? How much do I tip on $84 split four ways? How many square feet is this room, and what will flooring cost? What’s this road trip going to cost in gas?

The school tools take pasted lists — courses with grades and credits for GPA, assignments with scores and weights for grades — and handle the arithmetic that’s easy to fumble at 2 a.m. before a deadline. The grade calculator’s most-used feature answers the question every student actually has: the exact score you need on the final exam to hit your target grade.

The generators are built properly: the password generator uses your browser’s cryptographic randomness and never sends anything over the network, the random number generator supports unique draws for raffles, and the dice roller covers every tabletop die from d4 to d100. And yes, the love calculator is here too — it’s for fun, and it says so.