What This Sales Tax Calculator Does

Feature	Description
Two Modes	Before Tax → Total	Total → Before Tax
Price Before Tax	Calculate tax and total from pre-tax price
Reverse Calculation	Find pre-tax price from total after tax
Sales Tax Rate	Enter any percentage (0-50%)
Tax Amount	Calculated tax amount
Total After Tax	Final price including tax
Effective Tax Rate	Actual tax percentage
Tax Per $100	How much tax on $100
US State Rates	50 states with combined tax rates
Sliders	Interactive controls for all inputs
Multiple Currencies	USD, EUR, GBP, CAD, AUD, INR, PKR

Two Calculation Modes

Mode 1: Before Tax → Total

• Enter price before tax
• Enter tax rate
• Calculates: Tax amount + Total after tax

Mode 2: Total → Before Tax

• Enter total after tax
• Enter tax rate
• Calculates: Pre-tax price + Tax amount

Key Formulas

Calculation	Formula	Example
Tax Amount	Price × (Rate ÷ 100)	$100 × 8.5% = $8.50
Total After Tax	Price + Tax Amount	$100 + $8.50 = $108.50
Pre-Tax Price	Total ÷ (1 + Rate÷100)	$108.50 ÷ 1.085 = $100
Effective Rate	(Tax ÷ Price) × 100	($8.50 ÷ $100) × 100 = 8.5%

How to Use

Mode 1 (Before Tax → Total):

1. Enter price before tax (e.g., $100)
2. Enter sales tax rate (e.g., 8.5%)
3. View tax amount ($8.50) and total ($108.50)

Mode 2 (Total → Before Tax):

1. Enter total after tax (e.g., $108.50)
2. Enter sales tax rate (e.g., 8.5%)
3. View pre-tax price ($100) and tax amount ($8.50)

US State Tax Rates Included

All 50 states with combined state + average local tax rates:

State	Rate	State	Rate
Tennessee	9.55%	California	8.68%
Louisiana	9.55%	New York	8.52%
Arkansas	9.51%	Washington	9.40%
Alabama	9.22%	Texas	8.19%
Oklahoma	8.98%	Florida	7.02%

Click any state to automatically apply its tax rate

Example Calculations

Purchase: $100 item with 8.5% tax

Field	Amount
Price Before Tax	$100.00
Tax Amount	$8.50
Total After Tax	$108.50
Tax Per $100	$8.50

Reverse: $108.50 total with 8.5% tax

Field	Amount
Total After Tax	$108.50
Price Before Tax	$100.00
Tax Amount	$8.50

Keyboard Shortcuts

• Ctrl/Cmd + Enter — Recalculate
• Ctrl/Cmd + R — Reset to defaults