Lifestyle Calculators

Tips, dice, passwords, fuel costs and fun extras.

Tip, total and per-person split for any bill — rounding included.

Roll any dice pool and see the exact odds of every total.

Strong random passwords, rated by their entropy in bits.

Trip fuel cost, cost per mile, and real mpg from your own fill-ups.

Handicap index from your scores, course ratings and slopes.

A playful name-match score — for entertainment only.

Convert shoe sizes between US, UK, EU and CM, with half-size rows.

Best bedtime or wake-up time from 90-minute sleep cycles.

Diameter, sidewall, revs per mile and speedometer error for any tire size.