Tool directory
All tools
Browse every SolveKit utility. Each tool solves one real problem quickly, clearly, and without requiring an account.
Typing & keyboard
Typing Test Studio
Measure speed, accuracy and consistency, turn your own mistakes into a targeted drill, and check every key on the keyboard. Runs in the browser, nothing is uploaded.
GPA Calculator
Calculate weighted GPA from course grades and credit hours.
EducationWeighted Average Calculator
Find a weighted mean from paired values and weights.
EducationGCD Calculator
Find the greatest common divisor of two or more integers.
EducationLCM Calculator
Find the least common multiple of two or more integers.
EducationPermutation & Combination Calculator
Count ordered permutations (nPr) and unordered combinations (nCr) for choosing r items from n distinct items.
EducationProbability Calculator
Calculate event probability, complement, odds, and percentage.
EducationRoman Numeral Converter
Convert between positive integers and standard Roman numerals.
EducationRounding Calculator
Round numbers to decimal places, significant figures, or a chosen increment.
EducationSignificant Figures Calculator
Count significant figures and round a value to the required precision.
EducationLinear Equation Calculator
Solve a one-variable equation in the form ax + b = c.
EducationSlope Calculator
Calculate slope, intercept, distance, and equation from two points.
EducationSample Size Calculator
Estimate survey sample size from confidence level, margin of error, and population.
EducationVAT Calculator
Add or remove value-added tax and show the net and tax amounts.
FinancePrice per Unit Calculator
Compare package prices using a normalized cost per unit.
FinanceCAGR Calculator
Calculate compound annual growth rate between a starting and final value.
FinanceInflation Calculator
Estimate future purchasing cost from an annual inflation rate.
FinancePayPal Fee Calculator
Estimate PayPal processing fees and exactly how much lands in your account.
FinanceStripe Fee Calculator
Estimate Stripe card processing fees, or the amount to charge for a target payout.
FinanceeBay Fee Calculator
Estimate the eBay final value fee, the per-order fee, and the profit left on a sale after your own costs.
FinanceeBay Profit Analyzer
Upload an eBay Transaction report, match product costs by SKU or Item ID, and see actual profit by order, product, and payout without uploading seller data.
FinanceeBay Transaction Report Analyzer
Audit an eBay Transaction report for net proceeds, final value and promoted fees, refunds, shipping labels, and rows that need review.
FinanceeBay Payout Reconciliation
Group eBay transactions by payout ID, compare expected net proceeds with included payout transfers, and export differences for bookkeeping review.
FinanceeBay Earnings Report Analyzer
Upload an eBay Earnings CSV to total gross amount, expenses, refunds, item costs, and net earnings while finding loss-making orders and missing costs.
FinanceEtsy Fee Calculator
Estimate Etsy listing, transaction and payment processing fees on a sale, and the profit left after your costs.
Finance