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Finance
200 calculators
Mortgage, compound interest, retirement, budgeting — with formulas and real examples.
MortgageCompound InterestLoan +197 more
Health
204 calculators
BMI, calories, macros, body fat — practical health tools with honest context.
BMICalorieMacro +201 more
Math
329 calculators
High-school, college, engineering, and computer-science math — formulas, graphs, sequences, calculus, matrices, probability, and discrete math explained.
StandardScientificPercentage +326 more
AI & Machine Learning
40 calculators
LLM costs, tokens, GPU VRAM, RAG, embeddings, fine-tuning, inference, and AI ROI — formulas and engineering assumptions explained.
AI API CostLLM Cost ComparisonLLM Token Count +37 more
Business
203 calculators
Freelance rates, profit margins, break-even, invoices — for the self-employed.
Freelance RateContractor PayInvoice +200 more
Legal
58 calculators
Settlement estimates for workers comp, car accidents, wrongful termination, and more.
Workers' CompWrongful TerminationCar Accident Settlement +55 more
Construction
53 calculators
Concrete, paint, flooring, roofing — home improvement calculations simplified.
ConcretePaintRoofing +50 more
Date & Time
14 calculators
Age, date differences, business days, countdown — time calculations made easy.
AgeDate DifferenceTime Zone Converter +11 more
Science
20 calculators
Density, Ohm's law, optics, wave speed — physics and applied science tools.
Unit ConverterOhm's LawForce +17 more
Cooking
27 calculators
Recipe scaling, cups to grams, cooking time — kitchen math done right.
Recipe ScalerCooking Unit ConverterCalories From Recipe +24 more
Education
59 calculators
GPA, grades, college cost, student loans — every education calculation explained.
GPAGradeWeighted Grade +56 more
Travel
16 calculators
Fuel cost, road trips, flights, hotel — plan any trip with accurate budgets.
Fuel CostRoad TripGas Mileage +13 more
Home
49 calculators
Square footage, tile, solar, electric bills — every home calculation simplified.
Square FootageMulchGravel +46 more
Conversion
50 calculators
Length, weight, temperature, area, volume, speed — instant unit conversions for everything.
Kg to LbsLbs to KgCm to Inches +47 more
Everyday
50 calculators
Tip calculator, split bills, age, countdown, percentage — tools for daily decisions.
AgeDate DifferenceHours +47 more
Physics
262 calculators
Kinematics, forces, energy, electricity, waves — physics calculators with full derivations.
AccelerationAdiabatic ProcessAngular Acceleration +259 more
Statistics
40 calculators
Mean, median, variance, t-tests, ANOVA, regression, distributions — 40 statistics calculators with formulas.
VarianceWeighted MeanMedian Absolute Deviation +37 more
Chemistry
200 calculators
Stoichiometry, pH, gas laws, thermochemistry, equilibrium — 100 chemistry tools explained.
Activation EnergyActivation Energy GraphArrhenius Equation +197 more
Biology
200 calculators
Genetics, ecology, biochemistry, physiology — 100 biology calculators for students and researchers.
A260/A280 RatioAllele FrequencyAntimicrobial MIC +197 more
Medicine
20 calculators
eGFR, MAP, QTc, anion gap, drug dosing, GCS — clinical calculators for healthcare professionals and students.
Anion GapBmi ClinicalBody Surface Area +17 more
Biochemistry
20 calculators
Michaelis-Menten kinetics, ATP yield, PCR efficiency, DNA Tm, protein MW — biochemistry tools with full derivations.
ATP YieldDNA Copy NumberDNA Tm +17 more
Computers & Tech
100 calculators
Internet speed, storage, networking, hardware, cloud, servers, security, and computer science tools.
Download TimeUpload TimeFile Transfer Time +97 more
New: connected learning

Explore formulas—not just answers

The CalcNova Formula Explorer connects equations to their variables, assumptions, calculators, and related formulas. Begin with the completed nine-formula Fluid Dynamics collection.

Reynolds Number
Re = ρvL/μ

Flow regime and viscosity
Bernoulli Equation
P + ½ρv² + ρgh

Pressure and flow energy
Froude Number
Fr = v/√(gL)

Gravity-wave behavior
Open Formula Explorer →
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Free Online Calculators for Every Situation

CalcNovaHub is a free calculator resource with 2,199 tools covering finance, health, math, AI and machine learning, computers, science, biology, physics, chemistry, and more. Every tool covers practical, real-life calculations: whether you're figuring out a mortgage payment, planning your macros, estimating a freelance rate, or understanding a settlement offer.

Finance Calculators

Our finance calculators cover everything from basic compound interest to retirement planning. Each one shows the formula, walks through a worked example, and explains what the result actually means for your financial situation. Mortgage calculator, loan calculator, savings calculator, ROI calculator — all free, all with full explanations.

Health Calculators

Health calculators that go beyond a simple number. Our BMI calculator doesn't just give you a figure — it explains what the ranges mean, how BMI is calculated, and what other metrics to consider alongside it. TDEE, macro calculator, body fat percentage, ideal weight, water intake, and more.

Computers & Technology Calculators

Calculate download and upload time, internet data usage, RAID capacity, screen pixel density, subnet ranges, computer electricity cost, cloud storage, server capacity, password entropy, and more. Our 100 computer calculators cover everyday technology questions as well as networking, hardware, cloud, server, and computer-science calculations.

AI & Machine Learning Calculators

Plan and optimize modern AI systems with 40 free calculators for LLM tokens and API costs, MCP tool schemas, agent reliability, GPU VRAM, KV cache, serving concurrency, LoRA and QLoRA, distributed training, RAG retrieval, embeddings, multimodal AI, and productivity ROI. Every AI calculator explains its formula, engineering assumptions, worked example, and limitations.

Legal Settlement Calculators

The only general calculator site covering legal settlement estimates. Workers compensation, wrongful termination, car accident settlements, child support, and alimony — all with state-specific considerations, formula explanations, and guidance on when to consult an attorney.