Educational math only. Not a live tax authority, ZIP-code lookup, or advice on taxable items. Checkout totals can differ with rounding and exemptions.
Compare tax rates
Same pretax amount and quantity| Tax % | Tax (each) | Total (each) | Grand total |
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Key takeaways
- Sample only: $100 pretax · 8% → tax about $8.00, total about $108.00.
- Two modes: add tax to pretax, or reverse from a total with tax.
- You type the rate: Nestfigure does not provide live ZIP or city tax rates.
- How this calculator works
How it works
Forward: tax = pretax × percent; total = pretax + tax. Reverse: pretax = total ÷ (1 + percent/100). Details: how we calculate.
Worked examples
Guides
How does this sales tax calculator work?
In add mode: tax = pretax × rate; total = pretax + tax. Sample: $100 at 8% → tax about $8.00, total about $108.00. Reverse mode finds pretax from a total with tax. Educational only.
Does Nestfigure look up my local tax rate?
No. You type the percent. Rates vary by jurisdiction and item type.
Can I prefill from a link?
Yes. Parameters: amount, tax, mode (add|reverse), qty.
Is this calculator free?
Yes—free, no signup. Educational math only.
How we calculate · Common questions · Sample prefill · Percent off
Disclaimer: Educational arithmetic only—not a live tax table, ZIP lookup, or legal tax advice.
YMYL notice: This site is for education only. It is not financial, tax, or investment advice. Nestfigure is not a bank, credit union, broker, investment adviser, or fiduciary. Product terms, rates, and penalties vary—always read your institution’s disclosures before acting. Calculator results are mathematical estimates, not bank quotes.