Productivity Calculators
Quantify your time and efficiency with our free productivity calculators — from meeting cost and hours worked to automation ROI and team availability metrics.
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Time & Scheduling
Hours worked, meeting cost, availability, and deadlines
Automation & Savings
Automation ROI, workflow savings, and efficiency gains
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Productivity Glossary — Key Terms Explained
- Bradford Factor
- A formula used by HR to measure persistent, short-term absenteeism: Score = S² × D, where S is the number of separate absence periods and D is total days absent. High scores (often above 450) trigger review. Punishes frequent short absences more than one long absence.
- Uptime / Availability
- The percentage of time a system is operational. Expressed as 'nines': 99% = 3.65 days downtime/year; 99.9% = 8.76 hours; 99.99% = 52.6 minutes; 99.999% = 5.26 minutes. Critical systems typically target 99.9%+.
- ROI (Automation)
- The financial return from an automation investment: ROI = (Annual savings from automation − Cost of automation) ÷ Cost of automation × 100. Most business process automations pay back within 6–18 months.
- Time to Value (TTV)
- How long from project start until the automation or productivity tool delivers measurable benefit. Shorter TTV favours adoption. Calculate alongside ROI when evaluating productivity investments.
- Deep Work
- Cal Newport's term for focused, cognitively demanding work without distraction. Research suggests 4 hours of deep work per day is near the human maximum. Productivity tools should protect deep work blocks.
Frequently Asked Questions
How do I calculate the cost of a meeting?
Meeting cost = Sum of (hourly salary of each attendee) × meeting duration. Example: 8 people at an average loaded salary of £50/hour in a 1-hour meeting = £400. A 30-minute daily standup with the same team = £200/day = £1,000/week = £52,000/year. Use the meeting cost calculator to see this for your specific team.
How do I calculate automation ROI?
Automation ROI = (Annual time saved × cost per hour − Annual tool/maintenance cost) ÷ Total investment × 100. Example: automation saves 5 hours/week at £40/hour = £10,400/year. Tool costs £2,400/year, implementation £5,000. Annual net saving = £10,400 − £2,400 = £8,000. ROI = £8,000 ÷ £7,400 (£5,000 + first year tool) = 108% in year 1.
What is the 99.9% uptime SLA in hours?
99.9% uptime = 0.1% downtime per year = 365 days × 24 hours × 0.001 = 8.76 hours of allowed downtime per year, or about 43.8 minutes per month. 99.99% = 52.6 minutes per year. Web hosting and SaaS agreements typically guarantee 99.9% or 99.95% uptime.
How do I calculate absenteeism rate?
Absenteeism rate = (Days absent ÷ Total working days) × 100. For a team of 10 over a month with 200 working days, if 20 days are absent: 20 ÷ 200 × 100 = 10%. The UK average absenteeism rate is 2.7–3.7% (4.9–6.8 days per employee per year).