The Hesapstan loss calculator is designed to calculate the loss amount and loss rate when a sale happens below cost. It works as the mirror of the profit calculator: it solves for the missing value from cost and selling price, cost and loss rate, or selling price and loss rate.
What does the loss calculator do?
This tool supports three calculations: loss amount and rate from cost and selling price, selling price from cost and loss rate, and cost from selling price and loss rate.
In cost + selling price mode, if the entered selling price is higher than the cost, the tool automatically shows this as profit — loss calculation only applies when the selling price is below cost.
This tool calculates loss from basic cost and selling price values. VAT, commissions, shipping, advertising, returns and fixed costs are not added automatically.
How is the loss rate calculated?
The tool shows the loss rate on two different bases: relative to cost (loss / cost × 100) and relative to selling price (loss / selling price × 100). This mirrors the markup-versus-margin distinction on the profit side.
For example, if cost is 150 and selling price is 100, the loss is 50. The loss rate relative to cost is 50 / 150 × 100 = 33.33%, and relative to selling price it is 50 / 100 × 100 = 50%.
Calculating selling price from cost and loss rate
In this mode, you enter the cost and the loss rate you are willing to accept (relative to cost). The tool computes the selling price: selling price = cost × (1 - loss rate / 100).
For example, if cost is 150 and the loss rate is 20%, selling price is 150 × 0.80 = 120. This is useful for clearance pricing with a defined maximum loss.
Calculating cost from selling price and loss rate
In this mode, you enter the selling price and the loss rate relative to cost. The tool works backward to find the cost: cost = selling price / (1 - loss rate / 100).
If the loss rate is entered as 100%, the cost cannot be computed because the division becomes undefined. The tool shows an error in this case.
What does this tool not calculate?
- It does not calculate VAT or taxes.
- It does not separately calculate marketplace commission, payment fees or shipping.
- It does not add advertising cost, return rate or inventory cost.
- It does not handle multi-product, quantity, basket or inventory calculations.
Frequently Asked Questions
How is loss calculated?
Loss is cost minus selling price. If selling price is higher than cost, the result is profit, not loss.
What is the loss rate based on?
The tool shows two rates: loss relative to cost and loss relative to selling price. They give different results.
How do I find selling price from a target loss rate?
Selling price = cost × (1 - loss rate / 100).
Can cost be computed with a 100% loss rate?
No. At a 100% loss rate the division is undefined, so the tool shows an error.
Are VAT and commissions included?
No. The tool does not automatically add VAT, commissions, shipping or advertising costs.