UnitsKit — Free HVAC Calculators & Engineering Tools

Gay-Lussac’s Law Calculator Calculate the relationship between pressure and temperature of a gas at constant volume using Gay-Lussac’s Law: P₁/T₁ = P₂/T₂ Initial Pressure (P₁): atmkPammHgpsibar Initial Temperature (T₁): °CK°F Final Pressure (P₂): mmHg Final Temperature (T₂): K Calculate P₂ Calculate T₂ Reset Gay-Lussac’s Law Formula P₁/T₁ = P₂/T₂ Where: … Read more

Bowling Handicap Calculator Calculate your bowling handicap to level the playing field in league play. Handicap systems allow bowlers of different skill levels to compete fairly. Basis Score (League Average): Typically 200-220 for most leagues Handicap Percentage: % Common percentages: 80%, 90%, or 100% Your Average Score: Enter your current … Read more

Draw Length Calculator Measure your wingspan and calculate your optimal draw length for archery. Measurement Units: InchesCentimeters Your Wingspan: inches Your Age: Experience Level: BeginnerIntermediateAdvanced Calculate Draw Length Your Recommended Draw Length — inches Based on your — inches wingspan Suitable for intermediate archers How to Measure Your Wingspan Stand … Read more

Top Cut Calculator Calculate how many players will make the top cut in your tournament based on attendance numbers. Tournament Information Total Number of Players: Top Cut Percentage: 25% (Standard)12.5% (Competitive)10% (Large Events)50% (Casual)Custom Percentage Enter Custom Percentage (1-100): % Minimum Players in Cut (even if % is lower): Maximum … Read more

MTG Power Level Calculator Determine your Magic: The Gathering deck’s power level to ensure balanced gameplay with friends. Deck Information Deck Name: Format: CommanderModernStandardPioneerLegacyVintage Deck Characteristics Consistency (How often your deck performs its main strategy): 5 Speed (How quickly your deck can win): 5 Interaction (Removal, counters, disruption): 5 Efficiency … Read more

Rydberg Equation Calculator Hydrogen Spectrum Solver Calculate hydrogen spectral lines, transition energies, and visualize the electromagnetic spectrum Element: Hydrogen (H)Helium+ (He⁺)Lithium+2 (Li²⁺)Beryllium+3 (Be³⁺)Boron+4 (B⁴⁺) Initial Energy Level (ninitial): Final Energy Level (nfinal): Balmer Series (Visible Light) Rydberg Constant: 10967758.34100 m⁻¹ (Standard)10973731.568160 m⁻¹ (Precise) Calculate Transition Wavelength (λ) 656.28 nm Frequency … Read more

Student Loan Repayment Strategy Calculator | Optimize Your Debt Payoff Student Loan Repayment Strategy Calculator Find the best strategy to pay off your student loans and save money Your Loan Information Loan Name Balance Interest Rate Action % Remove % Remove + Add Another Loan Monthly Extra Payment ($) ? … Read more

Small Business Cash Flow Survival Calculator Determine how long your business can survive with current cash flow and expenses Current Cash Balance ($): Average Monthly Income ($): Fixed Monthly Costs ($): Rent, utilities, subscriptions, etc. Variable Monthly Costs ($): Inventory, payroll, marketing, etc. Monthly Debt Payments ($): Emergency Fund ($): … Read more

Freelance Tax Withholding Calculator Estimate how much to set aside for taxes on your freelance income Annual Freelance Income: $ State: No state income taxAverage state tax (5%)High state tax (7%)California (9.3%)New York (8.82%) Filing Status: SingleMarried Filing JointlyHead of Household Other Deductions ($): $ Calculate Tax Estimated Tax Results … Read more