Caffeine Half-Life Calculate how much caffeine remains in your body for coffee, tea, or custom drinks. Open tool
Compound Interest Calculator Estimate the future value of a starting amount with annual additions and compounding returns. Open tool
URL Slug Generator Create SEO-friendly slugs from titles or phrases. Handles punctuation and spacing cleanly. Open tool
String Case Converter Convert strings into common cases (snake, camel, kebab, Title Case) quickly. Open tool
FI Target Estimator Estimate a FI target from monthly expenses and a safe withdrawal rate, then see your years to reach it. Open tool
Time to FI Estimate how many years until FI, given your income, savings rate, and return assumptions. Open tool
Coast‑FI Planner Find when you can stop contributing and let compounding take you to your FI goal. Open tool
Daily → Monthly / Annual Convert daily hotel prices into monthly and annual equivalents to understand long-term costs. Open tool
Latte Year Cost & Investment Calculate the cost of one latte per day for a year and projected S&P500 returns after 30 years from investing that amount. Open tool
Compound Interest Calculator Estimate the future value of a starting amount with annual additions and compounding returns. Open tool
Emergency Fund Calculator Quickly see how many months your current savings will cover based on monthly expenses. Open tool
Rule of 72 Calculator Estimate how long your money will take to double at a given annual return using the Rule of 72. Open tool
Japan: Mortgage vs Rent Compare owning vs renting in Japan with Tokyo / Osaka presets, taxes, repair, and more. Open tool
Proposed Japan Empty Homes Tax Calculator Estimate annual empty home (Akiya) tax for a vacant property in Japan using proposed Kyoto legislation; supports USD/JPY conversion. Open tool
SF ↔ Tokyo Salary Convert salaries between San Francisco and Tokyo with cost of living adjustments. Open tool
NYC ↔ London Salary Convert salaries between New York City and London with cost of living adjustments. Open tool
LA ↔ Mexico City Salary Convert salaries between Los Angeles and Mexico City with cost of living adjustments. Open tool
LA ↔ Seoul Salary Convert salaries between Los Angeles and Seoul with cost of living adjustments. Open tool
LA ↔ London Salary Convert salaries between Los Angeles and London with cost of living adjustments. Open tool
NYC ↔ Tokyo Salary Convert salaries between New York City and Tokyo with cost of living adjustments. Open tool
Seattle ↔ Vancouver Salary Convert salaries between Seattle and Vancouver with cost of living adjustments. Open tool
SF ↔ Bangalore Salary Convert salaries between San Francisco and Bangalore with cost of living adjustments. Open tool
NYC ↔ Paris Salary Convert salaries between New York City and Paris with cost of living adjustments. Open tool
SF ↔ Beijing Salary Convert salaries between San Francisco and Beijing with cost of living adjustments. Open tool
SF ↔ Shanghai Salary Convert salaries between San Francisco and Shanghai with cost of living adjustments. Open tool
NYC ↔ Philadelphia Salary Convert salaries between New York City and Philadelphia with cost of living adjustments. Open tool
NYC ↔ Honolulu Salary Convert salaries between New York City and Honolulu with CoL adjustments. Open tool
LA ↔ Honolulu Salary Convert salaries between Los Angeles and Honolulu with CoL adjustments. Open tool
SF ↔ Honolulu Salary Convert salaries between San Francisco and Honolulu with CoL adjustments. Open tool
Chicago ↔ Atlanta Salary Convert salaries between Chicago and Atlanta with CoL adjustments. Open tool
SF ↔ Sacramento Salary Convert salaries between San Francisco and Sacramento with CoL adjustments. Open tool
LA ↔ Las Vegas Salary Convert salaries between Los Angeles and Las Vegas with CoL adjustments. Open tool
NYC ↔ Atlanta Salary Convert salaries between New York City and Atlanta with CoL adjustments. Open tool
LA ↔ San Diego Salary Convert salaries between Los Angeles and San Diego with CoL adjustments. Open tool
NYC ↔ Boston Salary Convert salaries between New York City and Boston with CoL adjustments. Open tool
DC ↔ Charlotte Salary Convert salaries between Washington DC and Charlotte with CoL adjustments. Open tool
DC ↔ Raleigh Salary Convert salaries between Washington DC and Raleigh with CoL adjustments. Open tool
NYC ↔ Orlando Salary Convert salaries between New York City and Orlando with CoL adjustments. Open tool
NYC ↔ Charlotte Salary Convert salaries between New York City and Charlotte with CoL adjustments. Open tool
Chicago ↔ Phoenix Salary Convert salaries between Chicago and Phoenix with CoL adjustments. Open tool
LA ↔ Sacramento Salary Convert salaries between Los Angeles and Sacramento with CoL adjustments. Open tool
NYC ↔ Stamford Salary Convert salaries between New York City and Stamford with CoL adjustments. Open tool
SF ↔ Portland Salary Convert salaries between San Francisco and Portland with CoL adjustments. Open tool
SF ↔ Seattle Salary Convert salaries between San Francisco and Seattle with CoL adjustments. Open tool
Tatami Mat Converter Convert tatami (畳 / jō) counts to m² and square feet with regional presets and a visualization. Open tool
Time to Destination Calculate how long it takes to walk, run, or hike a distance given your pace or quick presets. Open tool
Japan Sushi Lookup Find sushi and sashimi fish names in Japanese, romaji, and English. Handy for menus and ordering in Japan. Open tool
IHG Points Value Calculator Estimate the cash value of your IHG points given a redemption. Includes popular IHG brands: Holiday Inn, Kimpton, InterContinental, Crowne Plaza, Hotel Indigo. Open tool
Marriott Points Value Estimate Marriott Bonvoy points value using a baseline of $0.008 per point. Open tool
Hilton Points Value Estimate Hilton Honors points value using a baseline of $0.005 per point. Open tool
Hyatt Points Value Estimate World of Hyatt points value using a baseline of $0.0125 per point. Open tool
American Airlines Miles Value Estimate AAdvantage miles value using a baseline of $0.012 per mile. Open tool
United Miles Value Estimate United MileagePlus miles value using a baseline of $0.013 per mile. Open tool
Southwest Miles Value Estimate Southwest Rapid Rewards points value using a baseline of $0.013 per point. Open tool
Alaska Miles Value Estimate Alaska Atmos Rewards miles value using a baseline of $0.015 per mile. Open tool
Spirit Miles Value Estimate Spirit Free Spirit points value using a baseline of $0.006 per point. Open tool
Wyndham Points Value Estimate Wyndham Rewards points value using a baseline of $0.006 per point. Open tool
Choice Points Value Estimate Choice Privileges points value using a baseline of $0.005 per point. Open tool
Shoe Size Converter Convert shoe sizes between JP (cm), US (men/women), EU, and UK — great for online shopping and travel. Open tool
Tokyo: Key Phrases Useful Japanese phrases for traveling in Tokyo — choose one to show large for easy reading. Open tool
Paris: Key Phrases Essential French phrases to help you navigate Paris, dining and transit. Open tool
Rome: Key Phrases Useful phrases for travel in Rome — select a phrase to enlarge it for quick use. Open tool
Buenos Aires: Key Phrases Useful Spanish phrases for Buenos Aires travel, with large readable preview. Open tool
Istanbul: Key Phrases Useful Turkish phrases for Istanbul with a large preview for quick use. Open tool
Saigon: Key Phrases (Vietnamese) Useful Vietnamese phrases for Ho Chi Minh City for dining, transit, and emergencies. Open tool
Kenya: Key Phrases (Swahili) Useful Swahili phrases for Kenyan travel with an enlarged preview option. Open tool
Capitalize Each Word Transform text so each word starts with a capital letter — useful for titles and headings. Open tool
URL Slug Generator Create SEO-friendly slugs from titles or phrases. Handles punctuation and spacing cleanly. Open tool
Lorem Ipsum Generator Create placeholder text for mockups and samples, with paragraph and sentence controls. Open tool
Git Command Cheat Sheet Common git commands and short explanations with copy buttons for quick use. Open tool
String Case Converter Convert strings into common cases (snake, camel, kebab, Title Case) quickly. Open tool
Markdown ↔ HTML Convert Markdown to HTML and back in the browser; includes preview and copy. Open tool
URL Encode / Decode Encode or decode URL strings quickly using encodeURIComponent / decodeURIComponent. Open tool
O vs 0 checker Quickly inspect a character and tell whether it's the letter "O" or the number "0" (zero) — useful for screenshots and data errors. Open tool
Blue Light Glasses Test A simple visual test to get a feel for blue light filtering and contrast at different settings. Open tool
Caffeine Half-Life Calculate how much caffeine remains in your body for coffee, tea, or custom drinks. Open tool
Finasteride Half-Life Calculate how much finasteride remains in your body after taking doses. Open tool
Pomodoro Timer Simple 25/5 timer with start/pause/reset and a quiet alarm for focused work sessions. Open tool
Reading Time Calculator Estimate reading time for a book using pages, average words per page, and your words-per-minute speed. Open tool