Calculators

Free online calculators for everyday math and conversions.

Aspect Ratio Calculator

Calculate aspect ratios instantly. Convert dimensions, solve for missing sides, and browse 2025/2026 social media image sizes.

Convert salary to hourly rate instantly. Calculate annual, monthly, weekly, daily, and hourly pay with configurable working hours and leave days.

Calculate tips and split bills instantly. Supports HK 10% service charge toggle, custom tip %, and per-person split with WhatsApp sharing.

Calculate the final exam score you need, run GPA what-if scenarios across multiple grading systems, and export a verdict card locally.

Lay out a room in 2D, drag furniture into place, rotate selected items, and export a clean PNG with no account or watermark.

Create a client-ready invoice with your branding, taxes, and line items, keep drafts locally, and download a clean PDF with no watermark.

Track assets, liabilities, and net worth locally with HK-friendly fields, automatic history snapshots, and CSV export.

Estimate your daily calories with Mifflin-St Jeor, compare Harris-Benedict, and get macro targets you can bookmark.

Paste your task list, answer three low-friction questions, and get one next task to do right now.

Build a tailored cover letter with three templates, instant preview, and PDF download in your browser.