Math & Numbers

Calculate the overall efficiency of a multi-stage transmission. η_total = η₁·η₂·…·ηₙ. Enter one stage efficiency per line (decimal, e.g. 0.98). Optionally add an input power to get the total loss and per-stage output power.

Health

Calculate sweat rate, net fluid loss, and a recommended hourly drinking range from pre/post body weight, fluid intake, urine volume, and session duration.

Media

Remove or blur watermarks and logos from videos by specifying the watermark area

Finance

Discount a future lump sum or an annuity back to today's value (PV). Supports lump-sum and annuity cash flows, multiple compounding frequencies, a present-value decay curve, and a per-period breakdown. PV = FV / (1+r)^n for a lump sum.

Finance

Two-phase retirement model: an accumulation phase (current age to retirement, with monthly contributions and compound growth) and a withdrawal phase (retirement to life expectancy, nest egg grows at a conservative rate while inflation-adjusted withdrawals are taken out). Reports whether the nest egg lasts, real purchasing power, and any shortfall.

Media

Convert up to 20 uploaded images, or images inside a ZIP archive, into WebP files packaged as a ZIP

Development

Compare two JSON payloads and render a visual HTML diff with path-level additions, removals, changes, and statistics

Health

Estimate your daily protein target in grams from body weight and activity level. Coefficients (g per kg bodyweight) follow the ISSN 2017 position stand and the Morton et al. 2018 meta-analysis.

Text Processing

Audit text against a four-axis voice print (Formal/Casual, Confident/Cautious, Optimistic/Concerned, Playful/Serious) with a curated lexicon. Optional brand-reference comparison gives a 0–100 deviation.

Games

Classic hangman word-guessing game. Guess the hidden word letter by letter; six wrong guesses ends the game. Three difficulty levels, with general, animals, food, and science categories.

Text Processing

Score resume bullet points line-by-line: strong-verb matching (Implemented/Led/Owned vs Worked/Helped), quantified-metric detection (%/$/counts/time), length & repetition audit, industry buzzword blacklist (synergy/leverage/rockstar/ninja). Returns 0–100 per bullet with rewrite suggestions and synonym swaps.

Math & Numbers

Exponential decay for radioactive isotopes and drugs: remaining amount, derived half-life, time to target, or steady-state accumulation. Uses N(t) = N0·e^(-λt).