Everyday

Make smarter everyday decisions

Calculators, decision guides, and converters for daily life

Free everyday calculators, converters, and decision guides for daily math — percentages, tips, discounts, unit and temperature conversions, age and date math, grades, and GPA. When the number alone isn't enough, the quizzes help you decide: is that deal actually worth it, and how much should you tip in your situation? Fast answers, no signup required.

Student Toolkit

Finals week, solved with arithmetic

The four numbers every student needs at the end of a term: what to score on the final, what the GPA lands at, how many classes you can actually skip, and how to split the days you have left. Plus the essay-length math nobody teaches but everyone Googles at 2 a.m.

🎯Final Grade Calculator 🎓GPA Calculator 📝Grade Calculator 🏫Can I Skip Class?⏳Exam Countdown Planner 📄Words to Pages

😴 Are You Getting Enough Sleep?🐷 50-30-20 Student Budget

Unweighted GPA scale

A = 4.0A− = 3.7B+ = 3.3B = 3.0C = 2.0F = 0.0

Same scale as our GPA calculator — +0.5 Honors, +1.0 AP/IB for weighted.

Read the math first: How to calculate GPA · Percentage guide · Probability explained

Math Homework Helper

Check the answer, then learn the why

Eleven calculators for the questions math homework actually asks — percentages, fractions, exponents, probability, the Pythagorean theorem — each with a step-by-step breakdown you can hand in, and a matching explainer for the “but why” part.

%Percentage ½Fractions :Ratios √Square Roots xⁿExponents 🎲Probability 🎯nCr & nPr 📐Pythagorean σStandard Deviation 📉Average 🔢GCD & LCM

Fraction ↔ decimal equivalents

1/2 = 0.51/3 = 0.33331/4 = 0.251/5 = 0.21/8 = 0.1251/16 = 0.0625

Worth memorizing — they cover most homework fractions exactly.

The “but why” guides: Percentage guide · Exponent rules · Square roots · Probability · Standard deviation · Pythagorean

Smart Shopping & Deals

Know the real price before you check out

Sale tags, stacked coupons, per-unit sizes, and sales tax — the four places a price looks smaller than it is. These tools give you the number the register will actually charge.

🏷️Discount Calculator 🏷️Unit Price Calculator 🧾Sales Tax Calculator %Percentage 💵Tip Calculator

🤔 Is That Deal Worth It?

Deal math that surprises people

“20% off + extra 10%”: 28% total off — not 30%

“30% off + extra 20%”: 44% total off — not 50%

“Buy 3, get 1 free”: 25% off per unit

$50 at 30% off: $35.00 — and the calculator stacks coupons too

Stacked discounts multiply the remainder — they never simply add.

Shop smarter: How to calculate a discount · Unit price: which size wins · Printable tip chart