Tool directory

Work time calculators

Practical, browser-based tools for work hours, pay estimates, durations, decimal time, and weekday counts.

Which calculator should you use?

Start with the information you already have. If you know clock-in and clock-out times, use Work Hours or Time Duration. If you are totaling several days, use Time Card, Weekly Hours, or Biweekly Time Card. If you already have a duration and only need another representation, use one of the decimal-time tools instead.

Business-day calculators answer a different kind of question: they move through calendar dates while applying Hourformula's Monday–Friday model. Some business-day tools also let you manually exclude known dates.

Everyday work time

Core work tools

Work HoursStart and end time, minus an unpaid break.Time CardA Monday–Sunday time card with optional pay arithmetic.Time ClockClock-in time plus paid duration and unpaid break.OvertimeSplit total hours at a threshold and estimate pay.

Durations and formats

Hours and time

Calculate weekly totals, elapsed time, decimal hours, or a new clock time after adding or subtracting a duration.

Weekly Hours CalculatorAdd daily hours and minutes for a full week, then see the total as hours, decimal hours, and minutes.Biweekly Time Card CalculatorTotal two separate workweeks with clock-in, clock-out, breaks, overtime thresholds, and optional pay estimates.Decimal Hours CalculatorConvert hours and minutes to decimal hours, or convert a decimal-hour value back to hours and minutes.Minutes to Decimal Hours CalculatorConvert any minute value to decimal hours with a clear divide-by-60 result and precision guidance.Decimal Hours to Hours & Minutes CalculatorConvert decimal hours to hours and rounded minutes, including fractional values that do not map to an exact minute.Time Duration CalculatorFind elapsed time between two clock times, including one overnight rollover, with hours, decimal hours, and minutes.Time Addition CalculatorAdd hours and minutes to a clock time and see the resulting time, including calculations that cross midnight.Time Subtraction CalculatorSubtract hours and minutes from a clock time and see the resulting time, including calculations that cross midnight.

Calendar arithmetic

Business and working days

Count weekdays in a range or move forward and backward by a number of business days. Month/year tools count Monday–Friday dates and do not automatically subtract holidays.

Business Days CalculatorCount Monday–Friday business days between two dates, with endpoint control and optional manual date exclusions.Add Business Days CalculatorMove forward by a chosen number of Monday–Friday business days, with optional dates to exclude manually.Subtract Business Days CalculatorMove backward by a chosen number of Monday–Friday business days, with optional dates to exclude manually.Working Days in Month CalculatorCount all Monday–Friday weekdays in a selected month and year before holidays or organization-specific closures.Working Days in Year CalculatorCount all Monday–Friday weekdays in a selected calendar year before holidays or organization-specific closures.

Calculator results are only as specific as the inputs

Hourformula keeps arithmetic assumptions visible instead of silently choosing external rules. Overtime thresholds and multipliers are editable inputs. Business-day exclusions are manual where supported. Month and year weekday totals are calendar counts, not promises about an employer's actual schedule.

If you want to see the reasoning before using a tool, browse the calculation guides or use a reference chart.