Is this calculator really free?

Yes, no signup needed. For real profitability tracking across all products and stores, our Lite plan is $10/mo.

What should count as fixed cost?

Anything you pay monthly regardless of sales volume: software subscriptions, agency fees, fixed ad retainers.

Where do the numbers come from?

From your inputs plus the published rates the screen names — the tool invents no rate. Anything we could not verify is NOT pre-filled: the field stays empty and the row shows “—”.

⚖️Break-Even Calculator

Know the exact unit where you break even.

From monthly fixed costs, sale price and variable cost per unit: your exact break-even point. No signup.

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This calculator is free — no signup needed

Tool cost

⚖️ Break-Even Check

LIVE

Monthly fixed costs ($) · software, agency retainer, fixed ad spend, etc.

Professional selling plan

The monthly subscription every Amazon seller pays — if you already typed it into the fixed-costs box above, leave this at 0 or it will be counted twice. The amount comes from the marketplace of the currency you picked and is NOT converted (US $39.99 · UK £25 · EU €39). On the Individual plan you pay per item sold instead; that line is VARIABLE, not fixed, so it belongs in your unit cost.

Month length (days) · this divides the daily pace

Sale price ($)

Marketplace fees

Variable cost / unit ($, product+fees)

ⓘ Rounding: money lines are rounded to the nearest cent, and the total on screen is the sum of the lines on screen. Unit counts are rounded UP to the whole unit that actually reaches the target. The marketplace's own rounding can differ by a cent per line; in tiered rate cards the direction of that difference is not guaranteed.

Break-even / month (units)115

Contribution margin / unit: $10.49Break-even PRICE (per unit — does NOT cover fixed costs): $14.50Break-even ACoS — the most you can spend on ads per order: %42,0 · $10.49Break-even revenue / month: $2,873.85Units needed / day: 3.84

Fold the marketplace fee, the FBA fee and the ad cost per order into the variable unit cost — entering only the product cost makes the break-even volume come out too low.

Inputs are stored only in your browser, and the link carries the calculation itself.

Full analysis with real data → sign up

10 September 2026 we made a correction to this calculator that changed its results: some fields accepted zero or above-100% values without warning.

The problem

A positive margin doesn't mean you're actually profitable yet.

Until monthly overhead like software, agency fees and fixed ad retainers is covered, no sale is real profit yet.

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Fixed costs get ignored

Looking only at unit economics hides the monthly overhead burden.

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False sense of profit

'I profit on every sale' doesn't mean overhead is covered.

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Growth without a target

Without knowing your break-even units, you can't tell which month was actually profitable.

Features

Three inputs, your exact break-even.

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Contribution margin, automatic

Instantly computes price minus variable cost.

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Monthly + daily view

Shows break-even revenue and daily units needed together.

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Works for any overhead

Software, agency, fixed ads — you define what counts as overhead.

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Instant result

Recalculates as you type.

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No signup

The calculator on this page is completely free.

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Deeper inside

With an account: P&L Dashboard tracks real profitability across all products and stores.

How it works?

1️⃣

Enter fixed costs

Total monthly overhead: software, agency, fixed ads.

2️⃣

Enter price + cost

Sale price and variable cost per unit. Don't want to add the fees up yourself? Pick "Work the fees out for me" — the referral and FBA fee are derived from Amazon's published rate card.

3️⃣

See your break-even point

Monthly and daily units needed, instantly.

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Revenue goal → daily units

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Total launch capital

Frequently Asked Questions

Make sure the sale you think is profit, actually is.

With an account: P&L Dashboard tracks real profitability across all products and stores

Calculate Now Create a free account