Free calculator
Maintenance Downtime Cost, MTTR & MTBF Calculator
Breakdowns cost far more than the repair bill: lost operating hours, idle staff and rescheduled work add up. Enter how often an asset fails, how long repairs take and what an hour of downtime costs to get MTBF, availability and the annual cost, and see what planned maintenance and faster repairs could save.
Potential annual saving
₹14.8 L
Breakdowns cost ₹32.4 L a year today
- MTBF
- 359 hrs
- Availability
- 98.36%
- Downtime per year
- 144 hrs
- Downtime after
- 76 hrs
MTBF = (operating hours − downtime) ÷ breakdowns. Availability = MTBF ÷ (MTBF + MTTR). Breakdown cost = breakdowns × (MTTR × downtime cost per hour + repair cost).
How it is calculated
- Downtime per year
- Breakdowns × MTTR
- MTBF (mean time between failures)
- (Operating hours − downtime) ÷ breakdowns
- Availability
- MTBF ÷ (MTBF + MTTR) × 100
- Annual breakdown cost
- Breakdowns × (MTTR × downtime cost per hour + repair cost)
Frequently asked questions
What is the difference between MTTR and MTBF?
MTTR (mean time to repair) is the average time from a breakdown to the asset working again. MTBF (mean time between failures) is the average running time between breakdowns. Lower MTTR and higher MTBF both raise availability.
How do I calculate availability?
Availability = MTBF ÷ (MTBF + MTTR). For example, an asset that runs 360 hours between failures and takes 6 hours to fix is available 360 ÷ 366, about 98.4% of the time.
How do I estimate the cost of downtime per hour?
Add what stops when the asset stops: lost revenue or procedures, overtime and idle staff, hired or backup equipment, and penalties. For building assets such as AHUs or lifts in a hospital, include the cost of closing or shifting the areas they serve.
Can humblx track MTTR automatically?
Yes. Facility Maintenance timestamps every breakdown work order from report to closure, so MTTR, response time and SLA compliance per asset and vendor are calculated without manual logs.
More free tools
- Audited Spend Calculator (ROI)How much housekeeping spend is verified, today and with humblx.Open calculator
- Bed Turnaround CalculatorRevenue and bed-days freed by faster discharge-to-ready cleaning.Open calculator
- Housekeeping Staffing CalculatorStaff on roll from area, cleaning frequency and shifts.Open calculator
- SLA Compliance CalculatorSLA %, breaches, gap to target and backlog days.Open calculator
- Patient NPS & Rating CalculatorNet Promoter Score and reviews needed to lift your rating.Open calculator
Make your hospital audit-ready every single shift.
See humblx on your own floor plan. Most hospitals go live in under 30 days.