Free • No login • Instant results
Simple calculators for quick decisions.
Fast, clear, and reliable tools for everyday calculations—pricing, fees, budgets, and more. See results instantly with transparent formulas.
Simple inputs Clear breakdown Formula + FAQ on every tool
Instant output
Example result
Result
$1,248.40
Fees
− 12.4%
Percent-based
Budget
$38.20
Per order
Every calculator includes how it works, the formula, an example, and FAQs.
What you can calculate
Start with the most-used calculators. More categories will be added over time.
How SimpleTools works
A consistent, verifiable structure on every tool page.
1
Enter your numbers
Use simple inputs—USD, percentages, and per-order costs.
2
We apply transparent formulas
No black box: formulas and assumptions are shown.
3
Get instant results + breakdown
See the final number and what’s driving it.
Who this is for
Built for anyone who needs quick, reliable calculations without logging in.
E-commerce sellers and operators
Amazon, Shopify, Etsy, and marketplace users
Creators and small businesses planning pricing & budgets
Anyone who wants instant results with clear formulas
Built to scale
E-commerce tools are available now. More categories—tax, wedding, and daily calculators—will be added over time.