Is Engineering Calculator & Converter free?

Yes. Engineering Calculator & Converter is free for everyone and needs no sign-up to use. An account is only needed to export, download or print, because every export is recorded.

Are my files uploaded to a server?

No. Engineering Calculator & Converter works inside your web browser, so the files you open are processed on your own device. If you sign in, the work you save (such as drafts and registers) is also kept in your account so it follows you to other devices.

Does it work on a phone?

Yes. It works in current versions of Chrome, Edge, Safari and Firefox on phones, tablets and computers, with nothing to install.

Unit Converter & Engineering Calculator

Precision Matrix Pressure • Flow • Temp • Mass • Power

Multi-Category Industrial Unit Converter

Precision:

From Value & Unit

Converted Result

Instant Cross-Unit Equivalents

Standard Unit	Equivalent Value	Conversion Factor	Quick Copy

ISO 1999 / OSHA 1910.95

Workplace Noise Exposure & TWA Dose

Acoustics

Standard Regulatory Model

Measured Noise Level (dBA)

Exposure Duration (Hours)

Calculated Permissible Time (T)

Calculated Noise Dose: 0%

8-Hour Time-Weighted Avg (TWA): 0 dBA

Recommendation analysis will appear here.

ISO 7243 / OSHA Guidelines

Heat Stress Index & WBGT Sizer

Thermal Comfort

Dry Bulb Temp (°C)

Relative Humidity (%)

Solar Load (Sunlight)

Worker Metabolic Workload

Estimated WBGT Index: 0 °C

Rothfusz Heat Index: 0 °C

OSHA Risk Category: Low

Hydration and rest work-cycle guidelines.

ACGIH / ASHRAE 62.1

Industrial Ventilation & Air Changes per Hour (ACH) Sizer

HVAC Engineering

Room Length (m)

Room Width (m)

Room Height (m)

Target Application ACH

Calculated Room Volume: 0 m³ (0 ft³)

Required Airflow Rate (m³/h): 0 m³/h

Required Airflow Rate (CFM): 0 CFM

Recommended Exhaust Fan Sizing: 0 Fan Units

ASME Sec VIII / API 650 Horizontal • Vertical • Rectangular Sizing

Industrial Storage Tank & Vessel Capacity Calculator

Stored Substance:

Vessel Geometry Orientation

Internal Diameter (m)

Straight Shell Length (m)

Liquid Dip Level (m)

End Cap Dish Type

Calculated Volume & Mass 75% Full

Total Tank Capacity 0.00 m³ 0 Liters

Current Liquid Content 0.00 m³ 0 Liters

Liquid Mass Weight 0 kg 0.00 Metric Tons

Ullage (Empty Space) 0.00 m³ 25%

Statutory Audit Library ISO 45001 • ISO 14001 • ISO 9001 • OSHA / NIOSH

EHS & Industrial Compliance Reference Cards

ISO 45001:2018 OH&S Clause 6.1.2

Hazard Identification and Assessment of Risks and Opportunities:

Elimination (Physically remove hazard)
Substitution (Replace with non-toxic chemical)
Engineering Controls (Ventilation, sound encl.)
Administrative Controls (Permit to Work, Rotations)
Personal Protective Equipment (PPE compliant to EN 352)

ISO 14001:2015 EMS Clause 6.1.3

Environmental Aspects & Compliance Obligations:

Air emissions monitoring (SOx, NOx, Particulate)
Effluent & COD/BOD wastewater thresholds
Hazardous waste manifest & secondary containment
Spill containment capacity: ≥ 110% of largest tank

ISO 9001:2015 QMS Clause 7.1.5

Monitoring and Measuring Resources (Calibration):

Traceable calibration against NABL / NIST standards
Gauge Repeatability and Reproducibility (Gage R&R)
Process Capability Index: Cp & Cpk ≥ 1.33
Periodic validation intervals documented in audit logs

Permissible Statutory Limits Quick Reference

Parameter	Standard Limit (OSHA / NIOSH / ISO)	Corrective Action Trigger	SOP Reference ID
Occupational Noise (8hr TWA)	85 dBA (NIOSH REL) / 90 dBA (OSHA PEL)	> 85 dBA Action Level (Audiometry required)	SOP-CRM-EHS-01
Confined Space Oxygen Level	19.5% to 23.5% Vol	< 19.5% (Asphyxiation) or > 23.5% (Explosion)	SOP-CRM-EHS-04
Workplace Heat Stress (WBGT)	28.0 °C (Heavy) to 30.0 °C (Light)	> Threshold requires 50/50 work-rest cycle	SOP-CRM-EHS-07
Battery Room Ventilation	≥ 20 Air Changes per Hour (ACH)	Hydrogen concentration > 1% LEL	SOP-CRM-HVAC-02

Engineering Audit History

Persisted inside browser localStorage. Zero telemetry transmitted externally.

Time	Discipline	Input Parameters	Calculated Output	Status

EngiPulse Suite ISO & EHS 100% Offline

Multi-Category Industrial Unit Converter

Instant Cross-Unit Equivalents

Workplace Noise Exposure & TWA Dose

Heat Stress Index & WBGT Sizer

Industrial Ventilation & Air Changes per Hour (ACH) Sizer

Industrial Storage Tank & Vessel Capacity Calculator

EHS & Industrial Compliance Reference Cards

Permissible Statutory Limits Quick Reference

Engineering Audit History

Security Challenge

About Engineering Calculator & Converter

What it does

Frequently asked questions

Multi-Category Industrial Unit Converter

Instant Cross-Unit Equivalents

Workplace Noise Exposure & TWA Dose

Heat Stress Index & WBGT Sizer

Industrial Ventilation & Air Changes per Hour (ACH) Sizer

Industrial Storage Tank & Vessel Capacity Calculator

EHS & Industrial Compliance Reference Cards

Permissible Statutory Limits Quick Reference

Engineering Audit History

Security Challenge

Related tools

About Engineering Calculator & Converter

What it does

Frequently asked questions