Free, fast tools for everyday life
No account required. No data collected. All calculations happen directly in your browser.
Choose a tool
Paycheck Calculator
Estimate your take-home pay after federal tax, state tax, Social Security, and Medicare.
Use ToolShift Work Schedule
Generate a 4-week calendar for Panama, Pitman, 4-on-4-off, and DuPont rotations.
Use ToolRunning Pace Calculator
Calculate pace, predict finish times, and forecast race results using the Riegel formula.
Use ToolPregnancy Calculator
Find your due date, current week, trimester milestones, and fertile window.
Use ToolColor Contrast Checker
Check WCAG AA/AAA contrast ratios for text and get suggested accessible color alternatives.
Use ToolWhy QuicklyTools?
Instant results
No loading spinners. Results appear as you type.
Private by default
Everything runs in your browser. Nothing leaves your device.
Works everywhere
Fully responsive. Works great on phone, tablet, and desktop.