Omikuji Tools Life & Calc

Price Calculator: Tax, Discount & Margin

Tax-inclusive ⇔ tax-exclusive prices, discount rate ⇔ sale price, and cost/price ⇔ margin and markup, calculated as you type.

✨ Features

  • Tax-exclusive ⇔ tax-inclusive at 10%, 8% or any rate, with round-down / round / round-up for the tax
  • Sale price from list price and discount rate, or discount rate from list and sale prices
  • Gross profit, margin, markup and cost ratio from cost and price; required price for a target margin
  • Three calculators on one screen, updated as you type; copy results or share a URL

🪄 Use cases

Shopping and quotes

What a pre-tax price costs with tax, at the reduced rate for food.

Sales and negotiation

What 30% off comes to, or what discount a quoted price represents.

Pricing products

Work back from cost to a price that keeps a 30% margin.

Online selling

Check the margin after fees and cost.

🔒 Privacy

Amounts are processed in your browser and never sent to a server. Only when you shorten a share URL is that URL (including the input) sent to the shortening service.

❓ FAQ

How is the pre-tax price calculated from a tax-inclusive price?

Price including tax ÷ (1 + rate). At 10% divide by 1.1, at 8% by 1.08. The tax is the difference, with rounding applied.

What is the difference between margin and markup?

Margin is profit as a share of the price; markup is profit as a share of the cost. Cost 600 and price 1,000 give a 40% margin and a 66.7% markup.

How is the price for a target margin calculated?

Price = cost ÷ (1 − margin). Cost 600 with a 40% margin gives 600 ÷ 0.6 = 1,000.

Is rounding applied to the discount?

Discount results are shown to two decimals; tax amounts use the rounding you choose.

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Sales tax (inclusive ⇔ exclusive)

Tax rate
Amount entered is

Businesses may round tax amounts differently; switch the rounding if a receipt differs by 1.

Discount

%

Loyalty points or cashback are not the same as a discount; calculate them separately.

Profit margin, markup & cost ratio

Margin = profit ÷ price. Markup = profit ÷ cost. Cost ratio = cost ÷ price.