A/B Price Test Sample Size Calculator
Calculate the minimum sample size needed for a statistically significant A/B price test. Set confidence level, power, and minimum detectable effect.
Convert markup percentage to margin percentage. See the formula, conversion table, and understand why markup and margin give different numbers for the same transaction.
Price Breakdown
Quick Conversion Table
| Markup % | Margin % | Multiplier |
|---|---|---|
| 10% | 9.09% | 1.1× |
| 15% | 13.04% | 1.15× |
| 20% | 16.67% | 1.2× |
| 25% | 20% | 1.25× |
| 30% | 23.08% | 1.3× |
| 33.33% | 25% | 1.333× |
| 40% | 28.57% | 1.4× |
| 50% | 33.33% | 1.5× |
| 60% | 37.5% | 1.6× |
| 75% | 42.86% | 1.75× |
| 80% | 44.44% | 1.8× |
| 100% | 50% | 2× |
| 125% | 55.56% | 2.25× |
| 150% | 60% | 2.5× |
| 200% | 66.67% | 3× |
| 250% | 71.43% | 3.5× |
| 300% | 75% | 4× |
| 400% | 80% | 5× |
| 500% | 83.33% | 6× |
Markup and margin are both ways to express profit as a percentage, but they use different denominators. Markup is profit as a percentage of cost, while margin is profit as a percentage of selling price. This means a 50% markup does NOT equal a 50% margin — it actually equals a 33.33% margin.
This converter transforms any markup percentage into its equivalent margin percentage. It's useful for business owners, accountants, and pricing analysts who need to switch between these two metrics when moving from cost-based pricing to revenue-based financial reporting.
From solo freelancers to mid-market companies, having reliable markup to margin data supports stronger negotiations, tighter forecasting, and more confident strategic planning. Modify the inputs above to match your current business conditions and re-run the numbers as your market shifts.
Switching between markup and margin is one of the most common calculations in business, yet it is also one of the easiest to misread. This converter gives you the conversion and reference context needed to avoid confusing the two metrics when setting prices or analyzing profitability.
Margin (%) = (Markup / (100 + Markup)) × 100. Or equivalently: Margin = Markup / (1 + Markup) when using decimal form. Example: 50% markup → 50 / 150 × 100 = 33.33% margin.Result: 42.86% margin
A 75% markup converts to 75 / (100 + 75) × 100 = 75 / 175 × 100 = 42.86% margin. This means if you mark up a $100 product by 75% (selling for $175), 42.86% of your selling price ($75 of $175) is profit.
The conversion formula Margin = Markup / (1 + Markup) creates a non-linear relationship. At low markups, the two numbers are close (10% markup = 9.1% margin). But at high markups they diverge significantly (300% markup = 75% margin, not 300%). Understanding this non-linear relationship is crucial for accurate pricing and financial analysis.
Memorizing a few key conversions helps with quick mental math: 25% markup = 20% margin, 33.3% markup = 25% margin, 50% markup = 33.3% margin, 100% markup = 50% margin, and 200% markup = 66.7% margin. These anchor points cover most typical business scenarios.
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Because markup divides by cost (the smaller number) while margin divides by selling price (the larger number). Since the numerator (profit) is the same in both cases, dividing by the smaller number (cost) always produces a larger percentage than dividing by the larger number (price).
They are only equal at 0% — when there is no profit. As profit increases, the gap between markup and margin widens. At 100% markup, margin is 50%. At 200% markup, margin is 66.7%. They never converge again.
Use markup when setting prices from cost (“add 60% to my cost”). Use margin when analyzing profitability (“37.5% of my revenue is profit”). Investors, banks, and financial analysts typically think in margins. Procurement and pricing teams often think in markup.
It depends on your industry. A 50% markup (33.3% margin) is solid for retail but thin for software. Compare against your sector's norms. In general, higher-value or more specialized products can sustain higher markups than commodities.
For a rough estimate, margin is always about 2/3 of markup percentage for common ranges. More precisely: 25% markup ≈ 20% margin, 50% ≈ 33%, 100% = 50%, 150% ≈ 60%, 200% ≈ 67%. The conversion table in this calculator provides exact values.
No. Margin is profit divided by selling price, so it can never reach or exceed 100% (that would mean zero or negative cost). Markup, however, can be any positive percentage — a 500% markup means selling price is 6x cost, yielding an 83.3% margin.
Calculate the minimum sample size needed for a statistically significant A/B price test. Set confidence level, power, and minimum detectable effect.
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