About Calculators by Talcart
By Talcart · Last updated July 10, 2026
What is Calculators by Talcart?
Calculators by Talcart is a free collection of online calculators covering finance, health, math, business, and unit conversions. Every calculator runs instantly in your browser, needs no sign-up, and shows not just the answer but the formula behind it, a worked example, and answers to common questions.
How are the calculators built and verified?
Each calculator implements the standard, published formula for its topic (for example, BMI = weight ÷ height², or compound interest A = P(1 + r/n)^(nt)). Results are computed client-side from your inputs — nothing is sent to a server. We document the exact formula and a worked example on every page so you can check the math yourself.
Are the calculators really free?
Yes. Every calculator is completely free to use, with no account, no paywall, and no usage limits. The tools are supported by the broader Talcart project.
Who runs this site?
The site is built and maintained by Talcart. Calculators are reviewed and updated over time to keep formulas, examples, and explanations accurate and current.
Contact
Questions, corrections, or suggestions about a calculator? Reach out via talcart.com. We review reported issues and update the affected calculator.