Reliability and Safety Software Download
Get a quote
Reliability and Safety Software Demo

Reliability Software, Safety and Quality Solutions / Software / Free MTBF Calculator

Free MTBF Calculator from SoHaR

What is ALD/SoHaR MTBF Calculator?

ALD/SoHaR MTBF Calculator is a free software tool for Reliability Prediction. You will enter electronic or mechanical component data and receive predicted MTBF (Mean Time Between Failures) and Failure Rate:
MTBF Calculator

MTBF Calculator supports 26 most known and accepted reliability prediction standards listed below:
MIL-HDBK-217E-1 Part stress,
MIL-HDBK-217F-1 Part count, MIL-HDBK-217F-1 Part stress,
MIL-HDBK-217F-2 Part count, MIL-HDBK-217F-2 Part stress
CNET RDF93 rev 02/95
FIDES Guide 2004, FIDES 2009
GJB/Z 299B Part count, GJB/Z 299B Part stress
GJB 299C Part count and Part Stress
IEC 62380
Telcordia Issue 1, Telcordia Issue 2
Siemens SN 29500-1, Siemens SN 29500-2005-1 (Siemens Norm)
UTE C 80-810 (RDF2000)
NSWC-98/LE1 Mechanics

The software package also contains Reliability Data Component Library for active electronic components (IC-Digital, IC-Analog, IC-Memory) and Part Number automatic recognition algorithms for the most popular manufacturers of capacitors and resistors (see user guide for manufacturers list).

Is ALD/SoHaR MTBF Calculator free?
MTBF Calculator is a freeware. It is absolutely free - there is no time limit or installations count limit. There is no Ads. There is no commercial version of this product. There is no subscription to newsletters. Just install and use it.

Why is it free?
ALD .has been working in the field of reliability, safety and quality of the safety-critical and mission-critical equipment (mainly aerospace, defence, transportation and telecommunications) for more than 25 years.
We support the promotion of System Reliability and Safety and wish to make Reliability Prediction more accessible for reliability engineering practitioners and students.

Interested in a quick quote and time estimate for the  MTBF performed by our reliability engineering team?
We recognize that often organizations that do not perform reliability engineering tasks routinely may find it difficult to justify the cost of dedicating an otherwise busy engineer to learning a software tool (free or not) and taking the time to perform a task that he or she are not familiar with. Often in these cases it is cost effective for your organization to outsource these tasks to a team that specializes in this work and can provide the required results efficiently and at a low cost. SoHaR's reliability engineering team performs MTBF predictions daily and we would be glad to take on your tasks. Check out our quick, no strings attached, MTBF quote. It may be the solution you are looking for.

How to use the MTBF Calculator for reliability prediction?
ALD/SoHaR MTBF Calculator is Windows Desktop application. You should download and install it on your PC with MS Windows (XP, 2000, Vista).
For usage instructions, please see the MTBF Calculator User Manual - Reliability Prediction with ALD MTBF Calculator.

Where can I get ALD/SoHaR MTBF Calculator?
Download it from our web site: Download Free ALD MTBF Calculator.

How to install it?
Save the installation file to your local hard drive and run it. Installation wizard will guide you through the setup process. Then run the MTBF calculator from your Start menu, "ALD Engineering" menu group. See MTBF Calculator Installation Guide for detailed setup instructions.

What if I have problems or questions?
The MTBF calculator is freeware and is provided as-is, without technical support. However we are committed to continuously improve it and therefore appreciate your comments and suggestions - please send suggestions to [email protected] This e-mail address is being protected from spam bots, you need JavaScript enabled to view it .

MTBF Calculation Service

Fast Track quote for Reliability Prediction/MTBF

At SoHaR reliability predictions are our bread & butter. We've been doing them for decades and we keep all that "reliability engineering machinery" up and running. Set up is minimal, and the cost will definitely be less than taking one of your busy engineers away from their regular work to learn how to use a reliability package and generate a verifiable MTBF. Let us do this for you. Want to know right away how much it will cost? Submit your BOM (or start with an NDA if needed) with your contact details and we will turn around a quote within 24 hours, no strings attached!

Email us your  BOM to receive a no strings attached quotation within 24 hours.

Email us your NDA if you would like us to sign it before sending your BOM  Or
ask to receive a copy of our NDA.

Functional Packages in our complete reliability and safety toolset, RAM Commander:


  • 5 Standard Operating Reliability Prediction Methods
  • BOM Builder, Temperature Curves, Mission Profile, and Import Wizard
  • Full set of ready-to-print Reliability Reports
  • Enhanced Report Generator for user defined reports


  • 5 Standard Operating Reliability Prediction Methods
  • BOM Builder, Temperature Curves, Mission Profile, and  Import Wizard
  • User Defined Components Reliability Data Module
  • Full set of ready-to-print Reliability Reports
  • Enhanced Report Generator for user defined reports
  • Components Library Module (over 400k components)
  • RBD - Reliability Block Diagram


  • Maintainability Module (according to MIL-STD-472 Procedure 5A)
  • Built in libraries for Tasks, Times, STE, Skills, and Materials
  • Maintenance Engineering Report (MEA Report)
  • Maintenance Task Analysis Report
  • Full set of ready-to-print Reliability Reports
  • ILS Supprt Fields (user defined)
  • BOM Builder, Temperature Curves, Mission Profile & Import Wizard
  • Enhanced Report Generator for user defined reports
  • RCM/MSG-3 Module
  • FMECA Module


  • BOM Builder, and Import Wizard
  • FMECA (covering both Hardware & Functional) Module
  • Customizable FMECA Worksheet
  • FTA Module
  • FMECA Import/Export
  • Testability Module
  • Full set of FMECA & FTA ready-to-print Reports
  • Full set of ready-to-print Testability Reports including graphical trouble shooting, fault isolation, etc.
  • FMD-97 Library
  • Enhanced Report Generator for user defined reports


  • SSA supporting IEC 61508 (Safety Standard for Safety Instrumented Systems) and MIL-STD-882D (SHA, O&SHA), SAE, ARP 4754A, and ARP4761
  • Customizable FMECA Worksheet
  • FTA Module
  • RBD Module
  • Markov Chains Module
  • FMECA Import/Export
  • Full set of ready-to-print Safety Reports
  • Enhanced Report Generator for user defined reports


  • SSA & FHA according to SAE, ARP 4754A, ARP4761, and FAR 25 1309b
  • FTA including ready-to print reports
  • MSG-3 (System, Zonal, and Structural) including ready-to-print reports
  • MMEL including ready-to-print 5-column report
  • FMECA including ready-to-print FMECA reports, BOM Builder, and Import Wizard
  • Enhanced Report Generator for user defined reports
  • Report Template Utility for layout customization

See also:
Reliability & Availability Analysis Module
RAM Commander product homepage 
Reliability prediction methods Overview
SoHaR Reliability&Safety Services Overview 
Download the latest version of RAM Commander V8.2 (November 2011)


OOPS. Your Flash player is missing or outdated.Click here to update your player so you can see this content.