WiseCalc

Sales Tax Calculator

Estimate USD tax-inclusive or tax-exclusive prices using only your entered rate, with explicit cent rounding and conserving totals.

USD purchase estimate using only your entered tax rate. No jurisdiction rates, exemptions, fees or compound taxes are supplied. Tax-exclusive applies the percentage to pre-tax price; tax-inclusive extracts tax as total × rate / (100 + rate).

Calculation Type

$
$0$10,000
%
0%25%

The entered purchase amount is first rounded half up to cents. Tax is then rounded half up once: exclusive total = base + tax; inclusive base = total - tax. The rate is not rounded. A positive purchase below $0.005 is outside this cent-based estimate; enter zero or at least $0.005.

The rate is a percentage of the pre-tax base, not of the tax-inclusive total. Actual merchant or jurisdiction rounding can differ.

Sales Tax
$8.50
Pre-Tax Amount
$100.00
Total Amount
$108.50

Tax before cent rounding: ~8.5000e+0 USD. Purchase amount after cent rounding: $100.00.

Breakdown

USD breakdown: pre-tax / tax / total

  • Pre-Tax Amount: Breakdown $100.00
  • Sales Tax: Breakdown $8.50

USD breakdown: pre-tax / tax / total

USD purchase estimate using only your entered tax rate. No jurisdiction rates, exemptions, fees or compound taxes are supplied. Tax-exclusive applies the percentage to pre-tax price; tax-inclusive extracts tax as total × rate / (100 + rate).

The entered purchase amount is first rounded half up to cents. Tax is then rounded half up once: exclusive total = base + tax; inclusive base = total - tax. The rate is not rounded. A positive purchase below $0.005 is outside this cent-based estimate; enter zero or at least $0.005.

The rate is a percentage of the pre-tax base, not of the tax-inclusive total. Actual merchant or jurisdiction rounding can differ.

How to use this calculator

  1. USD purchase estimate using only your entered tax rate. No jurisdiction rates, exemptions, fees or compound taxes are supplied. Tax-exclusive applies the percentage to pre-tax price; tax-inclusive extracts tax as total × rate / (100 + rate).
  2. The entered purchase amount is first rounded half up to cents. Tax is then rounded half up once: exclusive total = base + tax; inclusive base = total - tax. The rate is not rounded. A positive purchase below $0.005 is outside this cent-based estimate; enter zero or at least $0.005.
  3. The rate is a percentage of the pre-tax base, not of the tax-inclusive total. Actual merchant or jurisdiction rounding can differ.

Frequently Asked Questions