Problems We Solve
Manual engineering calculations are slow, error-prone, and produce results that live in a spreadsheet no one else can verify. TriVolt solves the whole problem: deterministic math based on published standards, results encoded in shareable URLs, and PDF exports ready for capital proposals and compliance audits.
DC Critical Equipment Sizing
Scoping a new data center or an upgrade used to mean a spreadsheet, three standards documents, and a day of work. The DC Critical Equipment Sizing calculator takes your IT load, site tier, redundancy model, and PUE target and returns a complete equipment schedule in seconds: UPS capacity with modular unit configuration, diesel generator rating with motor-start margin, MV/HV transformer, switchgear fault current (rounded to IEC standard ratings), cooling plant in kW and tons of refrigeration, per-row PDU loading, and a 10-minute battery bank. It covers Tier I–IV per Uptime Institute Tier Standard 2022, N to 2N+1 redundancy, and US and IEC utility voltage ranges from 4.16 kV to 230 kV. PDF export included.
Reproducible, shareable results
Every calculator encodes its inputs into the URL hash. Hit Share and you get a link that opens the exact configuration you calculated — no re-entry, no "I calculated it yesterday with different numbers." Critical for handing off to a review committee, attaching to a project submission, or picking up where you left off.
Standards-aware, not just formula-aware
The PUE Calculator checks EnEfG compliance thresholds (new builds 2027, 2030; existing 2026, 2030) and ISO/IEC 30134-2 classifications automatically. The DC Efficiency Audit scores five dimensions against Uptime Institute tier requirements. The Critical Sizing calculator rounds switchgear to the nearest IEC 61439 standard kA rating, not just any number. Standards-based outputs, not just textbook formulas.
Full data center toolchain
Seven tools cover the complete DC power and cooling chain — from PUE and UPS sizing through rack density, power chain efficiency, cooling load, efficiency audit, and critical equipment sizing. Use them in sequence from concept through detailed design.
Broad engineering coverage
Beyond data centers: 68 engineering calculators across electrical systems, power, cooling and HVAC, hydraulics, mechanical, and civil engineering. 19 technical tools for network engineers covering subnetting, bandwidth, encoding, and DevOps utilities. 15 mathematics and unit converters. All with metric/imperial toggle — consistent across the whole site.
Real-World Use Cases & Scenarios
Residential Load Calculation
A residential electrician is designing the electrical service for a new 2,500 square foot home. They need to calculate the total electrical load to determine the appropriate service panel size and main breaker rating. Using our residential load calculation tools, they input the square footage, number of circuits, and major appliances (air conditioner, electric water heater, range, dryer). The calculator accounts for demand factors per NEC guidelines, showing that while the connected load might be 150A, the calculated load is only 120A due to diversity factors. This allows them to install a 200A service panel (with 25% headroom) instead of unnecessarily oversizing to 300A, saving the homeowner money while ensuring code compliance and safety.
Industrial Three-Phase Planning
An electrical engineer is designing the power distribution for a manufacturing facility that will house multiple three-phase motors totaling 500kW. They need to determine the transformer size, conductor sizing, and circuit breaker ratings. Using our three-phase power calculator, they input the total power requirement (500kW), system voltage (480V), and estimated power factor (0.85). The calculator reveals they need 707kVA of apparent power, requiring a 750kVA transformer. It also calculates the line current (708A), which determines they need 500MCM conductors per phase and 800A circuit breakers. Without this calculator, they might have incorrectly sized equipment based on real power alone, leading to system failures or costly over-engineering.
Power Factor Correction
A facility manager notices their monthly utility bill includes a power factor penalty. Their facility has a measured power factor of 0.72, which is below the utility's 0.90 requirement. Using our power factor correction calculator, they input their current apparent power (1000kVA) and power factor (0.72) to find they're only using 720kW of real power. To correct this to 0.95, they need to add 280kVAR of capacitive correction. The calculator helps them determine the capacitor bank size needed, and after installation, they eliminate the penalty and reduce their monthly bill by $1,200 while also reducing line losses and improving system efficiency.
HVAC System Sizing for Commercial Building
An HVAC engineer is designing the cooling system for a 10,000 square foot office building. They need to calculate the total cooling load to select the appropriate chiller and air handling units. Using our cooling load calculator, they input building parameters including square footage, occupancy, lighting load, equipment heat gain, and climate data. The calculator accounts for solar heat gain, internal loads, and ventilation requirements per ASHRAE standards. The result shows a total cooling load of 75 tons, which guides them to select an 80-ton chiller (with safety margin). They then use our electrical calculators to determine the chiller's power requirements (approximately 70kW), ensuring the electrical service can support the HVAC system.
Network Infrastructure Planning
A network engineer is designing the IP addressing scheme for a corporate network that needs to support 500 devices across multiple departments. Using our subnet calculator, they determine they need a /23 network (512 addresses) to accommodate all devices with room for growth. They then use VLSM (Variable Length Subnet Masking) to divide this into smaller subnets for different departments: 64 addresses for IT, 128 for engineering, 64 for sales, etc. This efficient addressing scheme prevents IP address waste and simplifies network management, while our bandwidth calculator helps them ensure their network links can handle the expected traffic load.
Voltage Drop Verification
An electrician is installing a 200-foot run of 12 AWG wire to power a 20A circuit for outdoor lighting. They're concerned about voltage drop over this distance, as excessive drop can cause lights to dim and equipment to malfunction. Using our voltage drop calculator, they input the wire size (12 AWG), length (200 feet), current (20A), and system voltage (120V). The calculator shows a voltage drop of 6.4V (5.3%), which exceeds the recommended 3% for branch circuits. This prompts them to upgrade to 10 AWG wire, reducing voltage drop to 4.0V (3.3%), ensuring proper equipment operation and code compliance.
Our Calculator Categories
Explore our comprehensive collection of engineering calculators, each designed to solve specific problems in your field. Each category includes multiple specialized tools with detailed explanations, formulas, and real-world examples.
Welcome to TriVolt
TriVolt is your comprehensive resource for free engineering calculators covering electrical engineering, power systems, HVAC, hydraulics, networking, and unit conversions. Our mission is to make professional-grade calculation tools accessible to everyone—from students learning the fundamentals to experienced engineers working on complex projects.
Each calculator on our platform is accompanied by detailed educational content explaining the underlying principles, formulas, practical applications, and real-world examples. We believe that understanding why calculations work is just as important as knowing how to perform them.
What Makes TriVolt Different
- Comprehensive Educational Content: Every calculator includes detailed explanations, formulas, examples, and practical applications—not just a tool, but a learning resource
- Wide Range of Disciplines: From basic electrical calculations to advanced network engineering tools, we cover multiple engineering fields
- Free and Accessible: All our calculators are completely free to use, with no registration required
- Mobile-Friendly: Our responsive design works seamlessly on desktop, tablet, and mobile devices
- Regularly Updated: We continuously improve our calculators and add new tools based on user feedback
- Transparent: All content includes publication dates, author information, and clear attribution
TriVolt vs. ChatGPT
LLMs like ChatGPT are useful for explaining concepts. They are not reliable for engineering calculations you need to stand behind. Four reasons:
- No shareable link. A ChatGPT answer lives in a chat session. TriVolt encodes every input into the URL — send the link and anyone opens the exact same calculation, immediately.
- Hallucinated intermediate steps. Multi-variable calculations (UPS capacity → generator sizing → transformer → switchgear fault current) require consistent intermediate values. LLMs frequently drift between steps, producing plausible-looking numbers that don't agree with each other.
- No standards compliance. TriVolt checks EnEfG thresholds, Uptime Institute tier requirements, and rounds switchgear to IEC 61439 standard kA ratings automatically. ChatGPT doesn't know which year's EnEfG cutoff applies to your build.
- No PDF export. When you need to attach a calculation to a capital proposal or compliance submission, a screenshot of a chat window isn't sufficient. TriVolt produces a formatted PDF.
Full comparison: TriVolt vs. ChatGPT for engineering calculations →
Our Calculator Categories
Our calculators are organized into four STEM categories. Click on any category to explore the available tools.
Science
Physics and chemistry calculators including the Ideal Gas Law, Molar Mass, Half-Life, and Decibels calculators. Each includes detailed explanations of underlying scientific principles, worked examples, and practical applications.
Technical
Professional tools for network engineers and IT/DevOps teams. Network tools include subnet calculators, VLSM, bandwidth analysis, and throughput calculations. DevOps utilities include JSON formatting, regex testing, JWT decoding, and cron scheduling.
Engineering
Our largest category with 68 calculators spanning six disciplines. Electrical & Electronics: Ohm's Law, voltage drop, cable sizing, and more. Power Systems: three-phase power, power factor correction. Cooling & HVAC: cooling loads, psychrometrics, refrigeration cycles. Plus hydraulic, mechanical, and civil engineering tools.
Mathematics
Unit converters for length, weight and mass, volume, area, and temperature. Baking tools for recipe scaling and pan size conversion. General calculators for percentages, loans, and fuel economy.
How to Use Our Calculators
- Browse Categories: Navigate through our calculator categories to find the tool you need
- Enter Values: Input your known values into the calculator fields
- Calculate: Click the calculate button to get your results
- Learn: Read the comprehensive educational content below each calculator to understand the principles and applications
- Verify: Always verify critical calculations independently, especially for safety-critical applications
Accuracy and Reliability
We strive for accuracy in all our calculators and educational content. All formulas are verified against established engineering principles and standards. However, it's important to remember that:
- Calculators are tools to assist with calculations, not replacements for engineering judgment
- Results should be verified independently for critical applications
- Real-world factors (tolerances, environmental conditions, etc.) may affect actual results
- Always follow applicable codes, standards, and safety regulations
Important Disclaimer
The calculators and tools on this website are provided for informational and educational purposes only. While we strive for accuracy, users should verify all calculations independently, especially for critical applications. We are not responsible for any errors, omissions, or damages arising from the use of these calculators. Always consult with qualified professionals for critical engineering decisions.
Get Involved
We're always looking to improve and expand our calculator collection. If you have suggestions for new calculators, found an error, or have feedback on our content, please contact us. Your input helps us serve the engineering community better.
Learn more about our mission, editorial practices, and commitment to quality on our About page.
