Free Tools & Guides for Ecommerce Sellers

Calculators and guides for Amazon, Shopify, Walmart and TikTok Shop sellers
Cash Flow
Customer Success
Finance
Inventory
Marketing
Tools
Can you pay off 8fig early? How 8fig Growth Plans handle early payoff

Can you pay off 8fig early? How 8fig Growth Plans handle early payoff

What 8fig's terms say about paying off a Growth Plan early, how the cost of capital works, and what to check before moving an 8fig balance.

November 12, 2026

Popular

Latest posts

Thank you! Your submission has been received!
Oops! Something went wrong while submitting the form.
Amazon
Cash Flow
Customer Success
eCommerce
Finance
Inventory
Marketing
Retailer Financing
Shipping
Shopify
Supply Chain
Tools
Partner Referral Calculator
Resource
Tools

Partner Referral Calculator

For agencies, 3PLs, and aggregators: estimate annual referral revenue from introducing your ecommerce merchants to Onramp Funds, based on merchant count, revenue, and funding rates.

September 5, 2026
eCommerce Working Capital Calculator: Health Check in 10 Inputs
Resource
Tools

eCommerce Working Capital Calculator: Health Check in 10 Inputs

Free working capital calculator for ecommerce sellers: ten inputs, a score out of 100 across cash runway, inventory turns, margin, cash cycle, seasonality, and platform mix, and the one thing to fix first. No form, no credit decision.

September 5, 2026
Merchant Cash Advance vs Revenue-Based Financing Cost Calculator
Resource
Tools

Merchant Cash Advance vs Revenue-Based Financing Cost Calculator

Compare the total cost of $50K from an Onramp advance, Shopify Capital, Amazon Lending, a merchant cash advance, and a bank term loan, side by side, with effective cost, weekly cash impact, and a repayment timeline.

September 5, 2026
Walmart Seller Fee Calculator
Resource
Tools

Walmart Seller Fee Calculator

Free Walmart seller fee calculator with referral and Walmart Fulfillment Services fee presets, refunds, and a cash timeline showing the biweekly payout gap. Import your payment report to use real numbers.

September 5, 2026
Shopify Profit Calculator
Resource
Tools

Shopify Profit Calculator

Free Shopify profit calculator with Shopify Payments fee presets, shipping and ad cost per order, refund handling, and a cash timeline. Import your Shopify payouts or orders export to use real numbers.

September 5, 2026
TikTok Shop Fee Calculator
Resource
Tools

TikTok Shop Fee Calculator

Free TikTok Shop fee calculator with the current 6% referral fee, affiliate commission, shipping, refunds, and a cash timeline showing the 15-day payout gap. Import your settlement export to use real numbers.

September 5, 2026
Amazon FBA Profit Calculator
Resource
Tools

Amazon FBA Profit Calculator

Free Amazon FBA profit calculator with current referral and FBA fee presets, refund handling, and a cash timeline that shows when your payout actually lands. Import your Payments report to use your real numbers.

September 5, 2026
Marketing and Inventory ROI Calculator for eCommerce
Resource
Tools

Marketing and Inventory ROI Calculator for eCommerce

Free marketing ROI calculator for ecommerce that returns net ROI on an ad or inventory investment after the cost of the capital that paid for it, with payback period and a cash timeline.

September 5, 2026
Safety Stock and Reorder Point Calculator for Peak Season
Resource
Tools

Safety Stock and Reorder Point Calculator for Peak Season

Free safety stock and reorder point calculator for ecommerce Q4 planning: latest safe reorder date, units to order for peak, purchase order cost and deposit timing, the maximum discount that still grows profit, and a cash timeline.

September 5, 2026