calculator DUO
Scientific calculations, reusable results, and private on-device history.
Available on the App Store
Free tools for
everyday tasks.
Smart, practical tools and step-by-step projects that move you from a question to a real-world result.
100% freeCalculations in your browserNo signup required
What would you like to get done?
Continue your workspace
Local browser storageRecommended ProjectTile a FloorPlan your measurements, tile quantity, grout, thinset, layout, curing, and finishing steps.10 guided stepsStart project roadmap
Start with a popular tool. Your recent visits will appear here.
Saved in this browser. No account needed.
Browse all toolsOn iPhone & iPad
Apps by Enbilex
Focused utilities with local-first preferences and interfaces built for everyday speed.
Download on the App Store
Sudoku Duo
Classic and Diamond Sudoku, step-by-step hints, daily puzzles, and achievements.
Available on the App Store
Tip Calc $
Exact tips, fair bill splitting, on-device receipt scanning, and local history.
App details & support
Unit Converter
Quick pairings, custom units, and twelve practical conversion categories.
Coming soon
Popular tools by topic
Focused starting points for the tasks people come here to finish.
Home Projects
Measure, estimate, and plan improvements with less material waste.
Money & Costs
Understand payments, margins, budgets, and recurring costs.
Writing & SEO
Check, format, and improve content without uploading it.
Unit Conversions
Convert everyday measurements with exact factors and formulas.
Miles to Kilometers ConverterKilometers to Miles ConverterLiters to Gallons ConverterGallons to Liters Converter
Browse Unit Conversions
Guided project
Plan your next home project
Clear steps, connected tools, saved progress, and practical results from start to finish.
Clear steps Real examples Private progress
Free to use, no signup required
Core calculations run in your browser; project progress stays on this device. Optional lookups send the required values directly to their provider.
Clear formulas, examples, and assumptions