RotoCurve calculators

Estimate net profit after eBay fees, payment fees, shipping, taxes, and item cost.

Estimate Amazon seller net profit using referral fees, fulfillment costs, inbound cost, and product cost.

Estimate profit on a Mercari sale after fees, shipping, supplies, and item cost.

Calculate estimated Poshmark seller profit with flat or percentage fees.

Estimate Etsy net profit after transaction fees, payment fees, listing fees, ads, shipping, and item cost.

Estimate profit on a bulk lot from unit cost, sell-through, average sale price, and fees.

Estimate how returns affect net profit after lost shipping, fees, and resale recovery.

Estimate TikTok Shop profit after referral fees, shipping, product cost, coupons, and affiliate commission.

Estimate profit from live-selling orders after platform fees, payment fees, shipping supplies, and item cost.

Calculate estimated Depop seller payout after fees, shipping, and item cost.

Estimate profit for local or shipped Facebook Marketplace sales after shipping, fees, and item cost.

Estimate OfferUp sale profit after shipping fees, seller fees, item cost, and meet-up expenses.

Calculate resale ROI from buy cost, sale price, shipping, and fees.

Find the minimum sale price needed to cover costs, percentage fees, and fixed fees.

Convert revenue and cost into gross profit, profit margin, and markup.

Calculate sale price from cost and target markup, or see the margin created by a markup.

Calculate return on investment from amount invested and net profit.

Calculate new price, revenue lift, and allowed volume loss after a price increase.

Calculate net profit from revenue, cost of goods, operating expenses, and taxes.

Calculate gross profit and gross margin from revenue and cost of goods sold.

Calculate billable dimensional weight from package length, width, height, divisor, and actual weight.

Work out shipping markup, margin, or loss when charging a buyer for shipping.

Estimate fuel cost for a trip from miles, MPG, and price per gallon.

Estimate whether optional shipping insurance makes sense from item value, loss rate, and premium.

Compare nearby and far-zone shipping costs using package count and average cost difference.

Convert package weight between pounds, ounces, grams, and kilograms.

Estimate the order value needed to offer free shipping without erasing margin.

Combine sale discounts, coupons, cashback, and tax to find the real net price.

Calculate sales tax, pretax price, and total purchase price quickly.

Measure the dollar and percentage change from an old price to a new price.

Turn monthly subscriptions into annual cost and compare cancellation savings.

Compare unit prices across package sizes, quantities, and discounts.

Stack credit card rewards, portal cashback, coupons, and gift card discounts to estimate true savings.

Calculate final price after percent discounts, dollar coupons, and sales tax.

Calculate savings from a price match, refund, or post-purchase adjustment.

Compare total and unit cost before and after a bulk discount.

Calculate tip, split total, and per-person cost for a bill.

Estimate inventory turnover and days inventory outstanding from cost of goods sold and average inventory.

Convert project pay, expenses, and time into an effective hourly rate.

Estimate monthly carrying cost for inventory using storage, capital, shrink, and insurance assumptions.

Find an hourly freelance rate from income target, billable hours, expenses, and tax reserve.

Find the sales volume needed to cover fixed costs with a given price and variable cost.

Calculate return on ad spend, revenue, profit after ad cost, and break-even ROAS.

Calculate conversion rate, revenue per visitor, and orders from visitors and conversion assumptions.

Calculate average order value and estimate lift from upsells or bundles.

Calculate commission payout from sales amount, rate, quota, and bonus.

Estimate PayPal fees and net payout from a sale amount, percentage fee, and fixed fee.

Estimate Stripe processing fees, net revenue, and fee share for card payments.

Calculate Square payment processing fees and net payout for in-person or online sales.

Estimate Shopify payment fees, platform fees, app costs, and net revenue for an order.

Estimate monthly payment, total paid, and total interest for a fixed-rate loan.

Estimate payoff time and total interest from balance, APR, and monthly payment.

Calculate monthly savings needed to hit a target by a deadline.

Estimate emergency fund target from monthly expenses and desired months of runway.

Compare monthly rent against estimated ownership cost to see the monthly difference.

Estimate principal and interest payment for a fixed-rate mortgage.

Estimate monthly auto loan payment from price, down payment, rate, and term.