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South African rules where location matters. Universal formulas where they do not. Get clear results, full breakdowns and transparent assumptions without creating an account.
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Showing 24 of 206 tools
Work and Pay
7 toolsSalary & PAYE
Estimate take-home pay after PAYE, UIF, retirement contributions and medical tax credits.
Open toolNet to gross
Find the estimated gross monthly salary needed for a target take-home amount.
Open toolOvertime pay
Compare weekday, Sunday and public-holiday value with the extra payslip top-up.
Open toolLeave payout
Estimate the gross value of known or accrued annual leave in days or hours.
Open toolUIF calculator
Estimate monthly UIF contributions or an unemployment benefit using credit days and IRR.
Open toolFreelance rate
Turn income goals, billable capacity, expenses and fees into a sustainable rate or quote.
Open toolResume builder
Build a job-ready CV with practical sections, formatting controls and local-first draft safety.
Open toolMoney and Debt
3 toolsCompound interest
Project final value, contributions and estimated growth with flexible compounding in any currency.
Open toolLoan amortization
Calculate fixed loan payments, total interest, fees and the effect of extra payments.
Open toolDebt payoff
Estimate payoff time and interest, then compare snowball and avalanche strategies.
Open toolBusiness and Documents
4 toolsProfit margin
Calculate fee-aware margin, markup, target price and break-even volume in any currency.
Open toolInvoice generator
Create share-ready invoice drafts with local line items, taxes and export-friendly formatting.
Open toolBarcode generator
Create barcode output with format-specific validation for common retail and operational flows.
Open toolQR code generator
Build shareable QR codes for URLs and contact/data use-cases with download-ready output.
Open toolEducation and Study
4 toolsGrade calculator
Build a grade and points model with categories, extra credit and target-score planning.
Open toolGPA calculator
Project cumulative, semester and target GPA with credits, pass/fail logic and scale options.
Open toolWheel spinner
Choose fairly with weighted spin controls, repeat prevention and keyboard-friendly controls.
Open toolWord counter
Count words, characters and readability metrics for writing workflows and assignment drafts.
Open toolImages and Everyday Maths
2 toolsPDF and Documents
4 toolsPDF compressor
Reduce PDF file size locally with clear quality and preservation trade-offs.
Open toolMerge PDF
Combine and reorder PDF files locally in your browser.
Open toolJPG to PDF
Turn images into an ordered PDF locally with page and margin controls.
Open toolPDF to JPG
Render selected PDF pages to images locally with explicit quality controls.
Open toolRecently added
New ways to get useful work done.
The newest public tools, ordered from the release registry—not a manually maintained list.
Amazon FBA Fee and Profit Calculator
Estimate Amazon referral, FBA fulfilment, storage, inbound shipping, advertising and product costs. Calculate profit, margin and break-even price.
Open toolAmazon PPC ACoS, TACoS and Break-Even Calculator
Calculate Amazon ACoS, TACoS, ROAS, break-even ACoS, maximum CPC and profit after advertising using product margin and campaign data.
Open toolAppliance Running Cost Calculator
Calculate how much an appliance costs to run per hour, day, month and year using wattage, usage time, duty cycle and your electricity rate.
Open toolAspect Ratio and Resolution Calculator
Calculate missing width or height, simplify an aspect ratio and compare resolutions while preserving exact image or video proportions.
Open toolAuto Lease Calculator
Estimate an auto lease payment from vehicle price, negotiated cost, residual value, money factor or APR, term, taxes, fees and down payment.
Open toolBaker's Percentage Calculator
Calculate baker's percentages, total dough weight and ingredient quantities from flour weight or target yield. Supports multiple flours and preferments.
Open toolBaking Pan Size Converter
Convert baking pan sizes and scale recipe quantities between round, square, rectangular and loaf pans using area, depth and fill assumptions.
Open toolBattery Backup Runtime Calculator
Estimate battery or UPS runtime from kWh, voltage and Ah, load, depth of discharge, inverter efficiency and reserve capacity.
Open toolBattery Life Calculator
Estimate battery life from mAh or Wh capacity, voltage, device current or power draw, duty cycle, efficiency and reserve capacity.
Open toolBurn Rate and Startup Runway Calculator
Calculate gross burn, net burn, cash runway and cash-out date. Model hiring, revenue growth, fundraising and cost-cutting scenarios.
Open toolCake Pricing and Food Cost Calculator
Calculate cake or food-product cost, labour, overhead, packaging, wastage, profit margin and recommended selling price.
Open toolCar Depreciation Calculator
Estimate car depreciation, future resale value and annual value loss using straight-line, declining-balance or custom yearly rates.
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- Work and Pay Tools5 tools
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- Cooking, Baking and Food Business Tools12 tools
- Automotive, EV and Travel Tools10 tools
- Developer, Security and Network Tools6 tools
- Electrical, Electronics and Digital Media Tools7 tools
Why Great Future
No black-box answers.
Money and employment calculations deserve more than a mystery result. We show the method, date every rule set, and make limitations visible.
- 01Accurate by construction
Pure calculation engines, boundary tests, and dated official rule sources.
- 02Private by default
Your tool inputs stay on your device. We don’t include the values you enter in tool analytics. Analytics and advertising follow your consent choices.
- 03Useful on a phone
One clear action, comfortable inputs, readable breakdowns, and no result gate.