Miryori

Overview

Miryori is a free calculator suite built around one complaint: most online calculators give you a number and nothing else. Every one of Miryori's 29 tools shows the formula it used in plain notation, walks through a worked example with realistic figures, and notes where the result stops being valid.

The suite covers personal finance (APY versus APR, compound interest, savings goals, loan and mortgage amortization, salary and overtime, PTO accrual), health (BMI, BMR, body fat, calorie targets, pace) and utility math (unit conversion, date and age, Roman numerals, password generation).

Key Features

The formula is always visible. The APY page shows APY = (1 + r/n)^n - 1 and walks a 5% nominal rate compounded monthly to 5.116%, so a reader can confirm the arithmetic with a pocket calculator.

A worked example with real numbers. Each tool includes a concrete scenario and states the assumptions behind it, which matters where the same input gives different answers under different conventions.

Nothing leaves the browser. Every calculation runs client-side: no account, no email gate, no server-side log. Salary figures, loan balances and body measurements stay in the tab.

Nine languages. English, Spanish, German, French, Portuguese, Japanese, Arabic, Korean and Simplified Chinese.

Use Cases

Students check homework by following the displayed formula. Employees work out take-home pay and the marginal value of an overtime shift. Borrowers compare loan offers through the same schedule and look at total interest.

Getting Started

No install and no account. Pick a calculator, type your numbers, and the result updates as you type.

Pricing

Every tool is free, with no paid tier and no trial. The site is ad-supported.

Technical Notes

A Next.js frontend with server-rendered calculator configs, MDX guides and Tailwind styling; formulas are typeset with KaTeX.

Accuracy

Figures are estimates for everyday decisions, not financial, medical or legal advice.