Check if your ads can actually make money.
A free, no-login calculator for margin, break-even ROAS, refund drag, discount damage, and shipping thresholds.
Before pushing ads, discounts, bundles, or paid traffic for any MicroVentures product, run the assumptions here. If contribution after ads is weak, fix the offer before adding spend.
Free. Client-side only. No account, no saved data.
Profit route
Estimated monthly orders: 58
Estimated monthly profit: £467.70
Profit gap: £432.30
Conversion needed: 4.6%
AOV economics use the representative item's 32.4% product cost-to-price ratio.
Shipping threshold
AOV lift needed: £8.00
Threshold net revenue: £45.00
Estimated product cost: £16.18
Threshold contribution: £18.02
Free shipping threshold can improve contribution if it lifts AOV enough.
Assumption: the threshold basket keeps the current 32.4% product cost-to-price ratio. Change the representative sale price and product cost if the basket mix differs.
Decision summary
At current contribution, the target needs 111 orders a month (4.6%). Qualified traffic, conversion, AOV, or margin could close the gap; this calculator cannot choose the best lever for you.
Ecommerce calculator summary Average order revenue after planned discount: £37.80 Estimated product cost per average order: £13.59 (using the representative item's 32.4% cost-to-price ratio) Contribution before ads: £15.12 (40.0% margin) Contribution after ads: £8.12 (21.5% margin) Break-even ROAS: 2.50x Estimated monthly orders: 58 Estimated monthly profit: £467.70 Target profit gap: £432.30 Conversion rate needed for target: 4.6% Shipping threshold verdict: Free shipping threshold can improve contribution if it lifts AOV enough. Estimated product cost at threshold: £16.18 (using the current 32.4% product cost-to-price ratio) Recommendation: At current contribution, the target needs 111 orders a month (4.6%). Qualified traffic, conversion, AOV, or margin could close the gap; this calculator cannot choose the best lever for you.
Ecommerce calculators for decisions before spend.
Use the calculator before adding discounts, paid traffic, bundles, or shipping thresholds. It is built for practical commercial decisions: does the unit economics survive once fees, returns, fulfilment, and ad spend are included?
What can the ecommerce calculators work out?
They calculate margin, contribution after ads, break-even ROAS, refund drag, discount impact, target-profit gap, and free-shipping threshold economics.
Is this an ecommerce margin calculator?
Yes. It is designed to show product margin before and after ads, platform fees, fulfilment cost, refunds, and discounts.
Does it replace tax or accounting advice?
No. The calculators are decision-support tools for commercial planning and should not be treated as tax, accounting, legal, or financial advice.
Is any data saved?
No. The calculator runs client-side, requires no login, and does not save the numbers you enter.