Evenline: Discount Calculator

by PL
Free plan available. Free trial available.

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by PL
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Free plan available. Free trial available.

Calculate the extra sales your discounts need to stay profitable. Built on real Shopify costs, fees, shipping and refunds.

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About the Evenline: Discount Calculator

Evenline is a break-even and profit margin calculator that helps you understand how much extra sales your discounts need to stay profitable. Built on your real Shopify data including cost per item, fees, shipping costs, and refund rates, it calculates the required sales lift for any promotion. Compare different offers like percentage discounts, price changes, free shipping, free-shipping thresholds, and multi-buy deals. Plan fair tests with accurate sample size and run time based on your actual traffic. Review results from any testing tool against your break-even line, then log decisions you can defend. Features versioned costs and a locked decision log available in English or Chinese. Evenline never changes your prices—it just shows you the math behind profitable discounting.

Launched: October 16, 2026

Key features

Break-even lift for price changes, discounts, free shipping and multi-buy offers
Uses your Shopify cost per item and order-history refund rate
Sample size and run time from your own traffic and costs
Review results from any testing tool against your break-even line
Versioned costs and a locked decision log, in English or Chinese