Everyday calculators and guides

Use these tools to compare scenarios, understand tradeoffs, and verify assumptions before making a everyday decision.

Internet Speed Calculator

Estimate internet speed needs using transparent assumptions for simultaneous streams, upload demand, devices, and work-from-home needs.

Estimate router coverage using transparent assumptions for square footage, construction materials, floor count, and device density.

Estimate tip and split amount using transparent assumptions for bill total, tip percentage, party size, tax treatment, and rounding preference.

Estimate percent change and shares using transparent assumptions for base value, percentage rate, increase/decrease direction, and comparison amount.

Estimate exact age or time span using transparent assumptions for birth date, target date, calendar months, leap years, and day counts.