Paper Tape Calculator Suite

About the Paper Tape Calculator

Eleven calculators in one page, and every result prints onto a running paper tape like an adding machine’s receipt: Standard (arithmetic and memory), Scientific (trig, logs, powers, roots, π and e), Programmer (binary, octal, decimal and hex with bitwise operations), Unit Converter (length, mass, temperature, volume, area, speed, time and data), Currency (exchange rates you can edit), Loan & Mortgage (payments and an amortization schedule), Percentage & Tip (tips, bill splits and percent change), Date Calculator (the span between dates, adding and subtracting days), Age Calculator (exact years, months and days), BMI & Health (BMI, BMR and daily calories) and Statistics (mean, median, mode and standard deviation).

Type from anywhere on the page: digits, operators, parentheses, Enter, Backspace and Escape work without clicking first, and Ctrl+1 to Ctrl+0, Ctrl+[ and Ctrl+] switch calculators. Right-click or long-press any number on the tape to see what it is and how it was worked out. Copy the tape as plain text or a Markdown table, or export it as a PNG image, a receipt PDF, a CSV file or a JSON backup you can import again; the loan schedule and the statistics report export as PDFs. Paper and dark themes. The tape and settings are kept in this browser’s storage.