Privacy-first by design

Free Online Calculators - Fast, Private, No Sign-up

CalcWise runs entirely in your browser for fast, private answers. Your inputs never leave your device, and every tool loads in a flash.

Quick calculator

Basic calculator

0

Why CalcWise

CalcWise is a collection of free online calculators that run entirely in your browser. No sign-up, minimal data use, and clear assumptions so you can move fast with confidence.

Growing

Calculator library

1000+

All-time users

100%

In-browser tools

Find the right calculator fast

Organized categories, simple inputs, and clear outputs.

Popular tools

Quick answers for everyday decisions.

Clear results, not clutter

Every calculator includes a plain-language summary, charted results, and a lightweight data table for accessibility.

  • Estimates and assumptions spelled out
  • Accessible charts with text summaries
  • Inputs tuned for mobile keyboards

Loan payoff

$32,840 total interest

Year 1 Year 10 Year 20 Year 30

Learn and decide with confidence

Guides, explainers, and deeper dives that link to the right tools.

Explainer

Bi-Weekly vs Monthly Loan Payments: Do You Actually Save Interest?

Compare biweekly loan payments vs monthly and see when timing changes interest.

Read explainer

Explainer

Loan Terms Explained: Principal, APR, Term Length, and Payment

Translate the five numbers that decide what a loan really costs.

Read explainer

Explainer

Gross Pay Calculation From an Hourly Wage

Use a simple formula to estimate gross pay before deductions.

Read explainer