Everyday & lifestyle

Compute weighted GPA across US, ECTS, IB, and more with honors rules. Fully client-side — no account, uploads, or remote storage.

Combine category scores and weights into a course average mid-semester. Fully client-side — no account, uploads, or remote storage.

Compute the exam score required to reach a target course grade given weights. Fully client-side — no account, uploads, or remote storage.

Convert between GPA and percentage ranges on a typical US 4.0 scale with pluses and minuses. Runs locally in your browser.

Convert between SAT and ACT using official concordance guidance with ranges explained. Fully client-side — no account, uploads, or remote storage.

Estimate total and daily study hours from topics, difficulty, and days left. Fully client-side — no account, uploads, or remote storage.

Calculate tip amount, grand total, and fair per-person shares with rounding options. Fully client-side — no account, uploads, or remote storage.

Suggest bedtimes or wake times aligned to ~90 minute sleep cycles. Fully client-side — no account, uploads, or remote storage.

Convert Earth age to planetary years using orbital periods for fun comparisons. Fully client-side — no account, uploads, or remote storage.

Calculate the true monthly and annual cost of owning a pet. Enter food, vet, grooming, insurance, and boarding costs to see your full pet budget — including a.

Calculate your monthly and yearly coffee spending. Compare café vs home brew costs and see how much your habit costs over 5–10 years.

Total paid hours from shifts with break rules and rounding. Fully client-side — no account, uploads, or remote storage. Runs locally in your browser.

Find out how much a meeting actually costs in salary and overhead. Enter attendees, duration, and average pay to see the true cost — and what it adds up to.

Estimate trip fuel cost from distance, economy, and price per unit. Fully client-side — no account, uploads, or remote storage.