Free Financial Calculator Collection
From ETF portfolio rebalancing to compound interest simulation — all the calculators investors need, free of charge.
Popular Tools
Time, text, unit, and salaryChoose time arithmetic, work hours, sleep, presentation, and world time calculators
Calculate daily, weekly, and monthly hours from shifts and breaks
Convert Korea, US Eastern, US Pacific, and major time zones
Estimate PPT presentation length from script and slides
Find bedtime and wake-up time from sleep cycles
Count characters, words, lines, and bytes
Create a free QR code from a URL or text
Pretty print JSON and check syntax
Arithmetic, percent, memory, and calculation history
Trigonometry, logs, square roots, and DEG/RAD modes
Convert bar, psi, Pa, kPa, MPa, atm, and mmHg
Estimate 2026 monthly take-home pay after payroll deductions
Take-home pay chart by annual salary range
Check YouTube thumbnail image links
Financial Calculators
Real-time price-based portfolio rebalancing. Automatically calculate buy/sell quantities for your target allocation.
Build and rebalance US ETF portfolios including SCHD, QQQ, VOO, SPY, and more.
Calculate and simulate optimal asset allocation ratios for All-Weather, Permanent, 60/40, and other strategies.
Automatically calculate optimal weights and rebalancing quantities for your holdings.
Simulate long-term investment returns and compound effect. Calculate time to reach your target amount.
ETF-Specific Calculators
Schwab U.S. Dividend Equity ETF Rebalancing
Nasdaq 100 ETF Rebalancing
Vanguard S&P 500 ETF Rebalancing
SPDR S&P 500 ETF Rebalancing
JPMorgan Equity Premium Income ETF
Vanguard Total Stock Market ETF
Schwab U.S. Large-Cap Growth ETF
Utilities
Check public Instagram Reels, video, photo, and profile picture links without login
Check public Reels download links and original media links
Check public video posts and video items inside carousel posts
Check image links from single photo and carousel posts
Check public profile image links from a profile URL or username
Check public Story URL preview availability without login
Change photo width and height and save as JPG, PNG, or WebP
Convert JPG to PNG or PNG to JPG in your browser
Convert WebP images to JPG or PNG
Arithmetic, percent, memory, and calculation history
Trigonometry, logs, square roots, and DEG/RAD modes
Convert bar, psi, Pa, kPa, MPa, atm, and mmHg
Convert pressure and common units in the browser
Count characters, words, lines, and bytes
Create a free QR code from a URL or text
Convert square meters and Korean pyeong
Calculate international age and Korean counting age
Format, minify, and validate JSON
Pretty print JSON and check syntax
Check YouTube thumbnail image links
Convert Korea, US, EU, and UK shoe sizes
Estimate 2026 monthly take-home pay after payroll deductions
Take-home pay chart by annual salary range
Choose time arithmetic, work hours, sleep, presentation, and world time calculators
Add/subtract time, calculate time differences
Calculate daily, weekly, and monthly hours from shifts and breaks
Find bedtime and wake-up time from sleep cycles
Estimate PPT presentation length from script and slides
Convert Korea, US Eastern, US Pacific, and major time zones
D-day countdown, date difference calculation
Merge PDFs, compress, convert images, and more