Section II · 55 tools
Calculators.
Mortgages, loans, interest, taxes, retirement, health, math, and the rest. Every tool computes in arbitrary precision and links its formula in plain language.
55 calculators in business
Working Days Calculator
Count business days between any two dates, excluding weekends and US federal or state holidays. Accurate results for payroll, legal, and project deadlines.
Price Per Unit Calculator
Calculate price per unit from any total price and quantity. Compare package sizes, apply sales tax, and convert units to find the best value deal.
Cost Per Minute Calculator
Calculate cost per minute from any total cost and duration. Supports US state sales tax rates. Perfect for phone plans, call centers, and consulting billing.
Business Days Calculator
Count exact working days between two dates, excluding weekends and public holidays, using a precise formula trusted by HR, payroll, and legal professionals.
Slack Time Calculator (Float / Cpm)
Compute slack time (float) for any project activity using the CPM formula Slack = LS - ES = LF - EF. Identify critical path tasks and scheduling flexibility.
Meeting Cost Calculator
Calculate the real labor cost of any business meeting using attendee count, hourly rate, duration, overhead, and U.S. state for a BLS-adjusted total.
Cycle Time Calculator
Calculate cycle time per unit by entering shift hours, break time, downtime, and total units produced. Supports output in seconds, minutes, or hours.
Lead Time Calculator
Calculate total order lead time by summing pre-processing, processing, and post-processing phases — with optional safety buffer and flexible unit conversion.
Deadline Calculator
Compute days remaining before a project deadline using total duration, elapsed days, day type, and an optional safety buffer percentage.
Keystrokes Per Hour (Kph) Calculator
Calculate keystrokes per hour (KPH) instantly using gross, net, or penalty scoring. Enter keystrokes, test duration, and error rate to benchmark your data entry speed.
Email Alternatives Productivity & Cost Savings Calculator
Calculate annual productivity savings and ROI from replacing email with Slack, Teams, or other collaboration tools. Adjusts for state wages, headcount, and email volume.
Event Ticket Sales Calculator
Instantly calculate the all-in cost of event tickets for adult, child, and senior attendees, including service fees and US state sales tax.