Date, Time & Everyday Utility Calculators

Date, Time & Utility Calculators

Calculate dates, ages, time zone offsets, business days, elapsed durations, restaurant tips, dedicated unit conversions, area conversions, and currency conversions.

Use editable rates, fees, holiday adjustments, UTC offsets, and dedicated conversion pages for common pairs like kg to lbs, cm to inches, feet to meters, miles to km, and square feet to square meters.

These calculators are informational estimates only. Verify important deadlines, payments, travel times, and exchange rates with the relevant source.

Date & Time

Choose a calculator and adjust date, time, rate, unit, or fee assumptions.

Date Calculator

Add or subtract years, months, and days from a starting date.

Calculate now->

Age Calculator

Calculate age in years, months, days, and total days between two dates.

Calculate now->

Time Zone Calculator

Convert a date and time between UTC offsets, including half-hour offsets.

Calculate now->

Business Days Calculator

Count weekdays between two dates with an editable holiday adjustment.

Calculate now->

Time Duration Calculator

Calculate elapsed days, hours, and minutes between two date-time values.

Calculate now->

Everyday Utility

Choose a calculator and adjust date, time, rate, unit, or fee assumptions.

Tip Calculator

Calculate tip, total bill, and split amount per person.

Calculate now->

Unit Converter

Convert common length, weight, volume, area, and temperature units.

Calculate now->

kg to lbs Converter

Convert kilograms to pounds with a dedicated weight conversion page.

Calculate now->

lbs to kg Converter

Convert pounds to kilograms with a dedicated weight conversion page.

Calculate now->

cm to inches Converter

Convert centimeters to inches for sizing, height, and measurement planning.

Calculate now->

inches to cm Converter

Convert inches to centimeters for sizing, height, and measurement planning.

Calculate now->

feet to cm Converter

Convert feet to centimeters for room, height, and measurement planning.

Calculate now->

cm to feet Converter

Convert centimeters to feet for room, height, and measurement planning.

Calculate now->

meters to feet Converter

Convert meters to feet for dimensions, travel, and building measurements.

Calculate now->

feet to meters Converter

Convert feet to meters for dimensions, travel, and building measurements.

Calculate now->

miles to km Converter

Convert miles to kilometers for travel, running, and distance planning.

Calculate now->

km to miles Converter

Convert kilometers to miles for travel, running, and distance planning.

Calculate now->

Fahrenheit to Celsius Converter

Convert Fahrenheit to Celsius with a dedicated temperature conversion page.

Calculate now->

Celsius to Fahrenheit Converter

Convert Celsius to Fahrenheit with a dedicated temperature conversion page.

Calculate now->

ounces to grams Converter

Convert ounces to grams for recipes, shipping, and everyday weight checks.

Calculate now->

grams to ounces Converter

Convert grams to ounces for recipes, shipping, and everyday weight checks.

Calculate now->

liters to gallons Converter

Convert liters to gallons for fuel, storage, and liquid planning.

Calculate now->

gallons to liters Converter

Convert gallons to liters for fuel, storage, and liquid planning.

Calculate now->

mL to cups Converter

Convert milliliters to cups for cooking, drinks, and liquid measurements.

Calculate now->

cups to mL Converter

Convert cups to milliliters for cooking, drinks, and liquid measurements.

Calculate now->

acres to square feet Converter

Convert acres to square feet for land and property measurements.

Calculate now->

square feet to acres Converter

Convert square feet to acres for land and property measurements.

Calculate now->

square feet to square meters Converter

Convert square feet to square meters for room, floor, and property area planning.

Calculate now->

square meters to square feet Converter

Convert square meters to square feet for room, floor, and property area planning.

Calculate now->

Currency Converter

Convert currency with an editable exchange rate and optional fee percentage.

Calculate now->

FAQ

Date, Time & Utility Calculator Questions

What can I estimate with date, time, and utility calculators?

You can calculate dates, ages, time zone conversions, business days, time durations, tips, generic unit conversions, dedicated kg-lbs, cm-inch, feet-meter, miles-km, temperature, volume, area conversions, and currency conversions with editable assumptions.

Does the time zone calculator handle daylight saving time?

It uses fixed UTC offsets. For travel, meetings, flights, deadlines, or payroll, verify with an official time zone database or calendar app that accounts for daylight saving rules.

Does the currency converter use live rates?

No. Enter the exchange rate from your bank, card issuer, exchange provider, or market source. Rates and fees can change constantly.

Can these calculators determine legal or official deadlines?

No. They are general planning tools. Confirm official deadlines, court dates, tax dates, payroll dates, and business-day rules with the relevant authority.