Reverse Markup Calculator
Know the selling price? Work backwards to find cost, markup %, or your maximum buy price.
Most markup calculator tools go one direction: enter cost and markup %, get selling price. This calculator goes the other direction. Enter any two of the three values — cost, selling price, markup % — and it calculates the third. Use it when you are working backwards from a price you have already seen in the market, auditing historical pricing, or figuring out the maximum you can pay for a product and still hit your margin target.
Reverse markup calculator
Switch modes to choose which value is calculated automatically.
Selling price $150.00 at 50% markup
How Reverse Markup Calculation Works
The formula is simple. Understanding why it works prevents the most common calculation error.
The Standard (Forward) Markup Formula
Selling Price = Cost × (1 + Markup% / 100) Example: $100 × (1 + 0.50) = $150
Reversed — Solving for Cost
Cost = Selling Price ÷ (1 + Markup% / 100) Example: $150 ÷ 1.50 = $100
Reversed — Solving for Markup %
Markup % = (Selling Price − Cost) ÷ Cost × 100 Example: ($150 − $100) ÷ $100 × 100 = 50%
⚠️ Do not subtract the markup % directly from the selling price.
A common mistake: “If the markup is 50%, then cost = $150 × 0.50 = $75.” This is wrong.
$150 × 0.50 = $75 is subtracting 50% of the selling price — that is calculating margin, not markup. The correct reverse: $150 ÷ 1.50 = $100.
The difference: $75 vs $100 — a $25 error on a single product. Across a catalog of 500 SKUs, this kind of error compounds into decisions that are completely wrong.
This confusion between markup and margin is the most expensive arithmetic mistake in retail and wholesale. Markup uses cost as the base. Margin uses selling price as the base. When you reverse a markup calculation, you divide by (1 + markup rate) — you do not subtract the markup rate from the selling price. The calculator above handles this correctly. If you are doing it manually, use the markup formula above exactly as written.
When Do You Actually Need a Reverse Markup Calculator?
These are the four situations where working backwards from price is more useful than working forwards from cost.
Scenario 1: You're a Buyer Evaluating a Supplier Quote
The situation: A supplier quotes you $34 for a product. You know similar products retail for $79. You want to know what markup the retailer is applying, and whether there is room to negotiate the supplier price down.
- Retail price: $79, Supplier cost: $34
- Markup % = ($79 − $34) ÷ $34 × 100 = 132.4% markup
- Gross margin = ($79 − $34) ÷ $79 × 100 = 57% margin
What this tells you: The retailer is applying a 132% markup — well above keystone. Either the product has strong brand value, or there is significant room between supplier cost and retail price. If you're the retailer, you could potentially pay up to $52.67 and still hit a 50% markup ($79 ÷ 1.50 = $52.67).
Scenario 2: You're an E-Commerce Seller Analyzing a Competitor's Price
The situation: A competitor is selling a product at $44.99. You know the product category typically runs 60%–80% markup. You want to estimate their cost structure to understand whether you can compete.
- At 60% markup: Cost = $44.99 ÷ 1.60 = $28.12
- At 80% markup: Cost = $44.99 ÷ 1.80 = $24.99
- So their likely cost range: $25–$28
What this tells you: If your cost for the same product is $22, you have a cost advantage and can either undercut them or take a higher margin. If your cost is $30, you cannot match their price profitably — find a cheaper supplier or differentiate enough to justify a higher price.
Scenario 3: You're Setting a Maximum Buy Price Before Negotiating
The situation: You're about to negotiate with a new supplier. You know your target retail price ($59.99) and your minimum acceptable markup (65%). You want to know the maximum you can pay before the deal stops making sense.
- Max Cost = $59.99 ÷ (1 + 0.65) = $59.99 ÷ 1.65 = $36.36
What this tells you: Walk into the negotiation knowing your number: $36.36 is your ceiling. If the supplier cannot get below that, the product does not work at your target price point. You either need to raise retail price, find a different supplier, or pass.
Scenario 4: You're Auditing Historical Pricing for Consistency
The situation: You have 3 years of sales data. You want to know whether your team has been applying consistent markup across your catalog, or whether pricing has drifted over time.
- For each SKU: Markup % = (Selling Price − Cost) ÷ Cost × 100
- Compare results across SKUs, categories, and time periods.
What this tells you: Pricing drift is common in businesses that price reactively. A reverse markup audit often reveals SKUs at 20% markup and others at 120% markup with no strategic logic. The fix is a markup policy — a defined range for each category — applied consistently.
Are You Working with Markup or Margin? Use the Right Formula.
| Reverse Markup | Reverse Margin | |
|---|---|---|
| What it finds | Original cost, given selling price + markup % | Original cost, given selling price + margin % |
| Formula | Cost = Selling Price ÷ (1 + Markup%) | Cost = Selling Price × (1 − Margin%) |
| Example | $150 ÷ 1.50 = $100 cost | $150 × (1 − 0.33) = $100.50 cost |
| Who uses it | Retail buyers, wholesale, product businesses | Finance teams, P&L-focused operators |
| Common mistake | Using margin formula when you mean markup | Using markup formula when you mean margin |
The formula you use depends on how your business defines its pricing target. If your team says “we target a 50% markup on cost,” use the reverse markup formula. If your team says “we target a 40% gross margin,” use the reverse margin formula. If you are not sure which one your business uses, check how your P&L is structured: if gross profit is shown as a % of revenue, you are working in margin. If it is shown as a % of cost, you are working in markup. Most retail and wholesale businesses use markup internally; most finance teams report in margin.
Use the markup vs margin converter to switch between the two instantly. For broader product-pricing context, use the how to price a product guide, the industry benchmarks, or the gross margin calculator.
Reverse Markup Questions
What is a reverse markup calculator?
How do I find the original cost from a selling price and markup %?
What is the difference between reverse markup and reverse margin?
How do I calculate the maximum I can pay for a product?
Can I use this to figure out a competitor's cost?
Why does subtracting the markup % from the selling price give the wrong answer?
Move from reverse calculation into formulas, benchmarks, and pricing strategy.
Reverse markup is one workflow. Use the related guides when you need exact formulas, cost-plus pricing, or category benchmark context.
Open Home CalculatorUse the exact formulas and spreadsheet syntax behind each calculation.
Convert the two correctly and stop missing pricing targets.
Check how your pricing compares with common markup ranges by sector.
Use the full pricing workflow from true cost to market benchmark.
For floor-setting workflows, review cost-plus pricing.