Free Online Tools & Calculators
Free tools including calculators, electoral guides, developer utilities, and home estimators — no sign-ups, no tracking, no data collection. Instant results, 100% private.
Free Tools & Calculators
Financial calculators, developer tools, electoral guides, health trackers, and home estimators — all in your browser. Nothing leaves your device.
Discord Timestamp Generator
Convert any date/time into Discord timestamp format. All 7 styles with full timezone support — relative, short time, long date, and more.
Use Tool →Split Bill Calculator
Fairly split restaurant bills and group expenses. Supports equal split and itemized mode with proportional tax and tip allocation.
Use Tool →Stripe Fee Calculator
Calculate Stripe payment processing fees instantly. Forward and reverse modes with support for 10 currencies and 3 card types.
Use Tool →Freelance Rate Calculator
Calculate your hourly rate, build project quotes with contingency, and generate professional invoices — all in one tool.
Use Tool →SaaS Churn & LTV Calculator
Model monthly churn rates, customer lifetime value, LTV-to-CAC ratio, and 12-month MRR projection with a live Canvas chart.
Use Tool →Sales Commission & Tiered Bonus Tracker
Calculate tiered sales commissions, track quota attainment with color-coded progress bars, and generate print-ready commission reports.
Use Tool →Cold Email Deliverability & ROI Modeler
Model your outbound pipeline from sent to closed deal. Simulate delivery, open, reply, meeting, and close rates to forecast revenue and spam risk.
Use Tool →Digital Product Pricing & Tier Optimizer
Determine the optimum price for your digital product with the Van Westendorp pricing model. Canvas intersection graph, acceptable price range, and Basic/Pro/Enterprise tier suggestions.
Use Tool →Time Zone Meeting Planner
Plan meetings across time zones with a visual 24-hour color-coded grid. Automatic best time suggestion for your team.
Use Tool →Salary to Hourly Converter
Bidirectional converter between annual salary and hourly rate. Includes PTO adjustment, benefits valuation, tax estimation, and part-time comparison.
Use Tool →Percentage Change Calculator
Calculate percentage increase, decrease, and overall change between two values. Three calculation modes with visual CSS bar charts.
Use Tool →Cable Voltage Drop Calculator
Calculate minimum electrical cable size based on voltage drop limits. Supports AWG/metric, copper/aluminum, single/three phase. For electricians and engineers.
Use Tool →JSON CSV XML YAML Converter
Convert between JSON, CSV, XML, and YAML instantly. Beautify, minify, download, and swap. Supports large files up to 10MB.
Use Tool →Cron Expression Builder
Build cron schedules visually with dropdowns. Plain English explanations, next 10 execution times, timezone support, and common examples.
Use Tool →API Rate Limit Calculator
Check API usage against rate limits, see remaining buffer, and estimate costs for paid APIs. Supports requests per second, minute, hour, and day.
Use Tool →AI Token Cost Calculator
Paste any text to estimate token usage and compare input/output costs across GPT-4o, Claude, Gemini, DeepSeek, and more. Privacy-first.
Use Tool →Fuel Cost Calculator
Estimate trip fuel costs by distance, vehicle efficiency, and fuel price. Calculate cost per passenger and CO2 emissions for any road trip.
Use Tool →Macro Calculator
Calculate your daily protein, carbohydrate, and fat needs based on age, gender, height, weight, activity level, and fitness goal.
Use Tool →VA Loan Calculator
Estimate monthly VA home loan payments including the VA funding fee. Supports purchase loans, cash-out refinance, and IRRRL streamline refinance.
Use Tool →Dog Age Calculator
Convert your dog's age to human years using breed-size-specific formulas. Supports small, medium, large, and giant breeds with life stage insights.
Use Tool →Time Duration Calculator
Calculate the exact hours, minutes, and seconds between two times or dates. Supports 12/24-hour formats, overnight duration, and payroll decimal hours.
Use Tool →Overtime Calculator
Calculate overtime pay at time-and-a-half and double-time rates. Enter hourly wage, regular hours, and overtime hours for any pay period.
Use Tool →Calorie Calculator
Calculate your daily calorie needs using the Mifflin-St Jeor equation. See calories for weight loss, maintenance, or gain based on your metrics and activity level.
Use Tool →Amortization Calculator
Generate a complete loan amortization schedule. See monthly payment breakdown, total interest, and the impact of extra payments on your payoff date.
Use Tool →Date Difference Calculator
Calculate the exact number of days, months, and years between two dates. Includes business days count, weekend breakdown, and age calculator.
Use Tool →Home Affordability Calculator
Estimate how much house you can afford based on your income, monthly debts, down payment, and interest rate. Follows the 28/36 rule.
Use Tool →Conduit Fill Calculator
Calculate how many wires can fit in EMT, PVC Schedule 40/80, or rigid conduit per NEC tables. Select conduit type, size, and wire gauge for instant fill results.
Use Tool →Parallel Resistance Calculator
Calculate total resistance for any number of resistors in parallel or series. Add/remove resistors dynamically with per-resistor current and power dissipation.
Use Tool →Battery Life Calculator
Estimate runtime for any device based on battery capacity (mAh/Wh) and power consumption. Includes device presets, series/parallel config, and real-world efficiency.
Use Tool →kW to Amps Calculator
Convert between kilowatts and amps for single-phase and three-phase systems. Power factor adjustment, voltage presets, efficiency, and NEC wire gauge lookup.
Use Tool →Wire Ampacity Calculator
Find the maximum current a wire can carry per NEC 310.16. Interactive tool with temperature correction, bundling derating, and insulation type adjustments.
Use Tool →Paint Calculator
Calculate exactly how many gallons of paint you need for any room. Wall dimensions, doors, windows, multiple coats, and cost estimation included.
Use Tool →Political Ideology Test
Rate 20 statements to map your position on the 2D political compass. Find where you land on Economic and Social axes with a visual chart.
Use Tool →Political Party Quiz
Answer 10 questions to discover which fictional party aligns with your views. Match percentage for all 4 parties with shareable results.
Use Tool →Concrete Calculator
Calculate cubic yards of concrete needed for slabs, columns, footings, and steps. Bag count, weight estimate, and mix ratio recommendations.
Use Tool →Flooring Calculator
Estimate flooring material for any room shape. Calculate tiles, hardwood, laminate, or vinyl with waste factor and cost estimation.
Use Tool →Square Footage Calculator
Calculate area in square feet for rectangles, circles, triangles, L-shapes, and trapezoids. Supports imperial and metric with visual references.
Use Tool →Sod Calculator
Calculate how much sod you need for your lawn. Pallets, rolls, square feet, and weight estimates with shape-specific lawn measurement.
Use Tool →BMI Calculator
Calculate your Body Mass Index instantly. Metric or imperial units, WHO categories, ideal weight range, and health insights.
Use Tool →Percentage Calculator
Find percentages, what percent one number is of another, and reverse percentages. Three modes with instant results and formula display.
Use Tool →Body Fat Calculator
Estimate body fat percentage using the US Navy circumference method. Height, neck, waist, and hip measurements with body fat category indicator.
Use Tool →Ideal Weight Calculator
Calculate your ideal body weight using Devine, Robinson, Miller, and Hamwi formulas. Frame size adjustment with BMI equivalent for each formula.
Use Tool →Due Date Calculator
Estimate pregnancy due date by LMP or conception date. Week-by-week timeline, trimester tracking, and current gestational age calculator.
Use Tool →Sleep Calculator
Find the best bedtime or wake-up time based on 90-minute sleep cycles. Power nap calculator and sleep debt estimation for better rest.
Use Tool →Age Calculator
Get your exact age in years, months, days, hours, and seconds. Birthday countdown, zodiac sign, generation finder, and age on other planets.
Use Tool →Tip Calculator
Calculate the perfect tip and split the bill among friends. Preset percentages, custom tips, per-person breakdown, and tipping customs by country.
Use Tool →Compound Interest Calculator
See how investments grow with compound interest. Monthly contributions, compound frequency, interactive chart, and year-by-year amortization table.
Use Tool →Simple Interest Calculator
Calculate simple interest on loans or investments. Reverse mode to find principal, rate, or time needed. Compare simple vs compound interest.
Use Tool →Car Payment Calculator
Estimate monthly auto loan payments with tax, fees, and trade-in. Amortization schedule, total interest, and income-based affordability check.
Use Tool →Password Strength Checker
Test password strength with entropy analysis. Check crack time, character types, and common passwords. Generate strong random passwords instantly.
Use Tool →Base64 Encoder Decoder
Encode text or files to Base64 or decode Base64 back to plain text. File upload, URL-safe mode, and character encoding selector included.
Use Tool →Color Converter
Convert colors between HEX, RGB, HSL, HSV, CMYK, and named colors. Visual picker, color harmonies, contrast checker, and accessibility tools.
Use Tool →URL Encoder Decoder
Encode or decode URL strings with RFC 3986 support. Batch mode, URI component encoding, and URL validation for development and debugging.
Use Tool →GPA Calculator
Calculate semester and cumulative GPA on the 4.0 scale. Weighted AP/IB support, "what if" grade scenarios, and grade distribution chart.
Use Tool →Seat Projection Calculator
Enter party vote percentages to see how seats would be distributed. Compare FPTP and proportional representation with a parliament diagram.
Use Tool →Swing State Tracker
Track 7 battleground states with polling averages, electoral votes, and lean indicators. Path to 270 visualization included.
Use Tool →Voter Guide Quiz
Answer 12 questions on key issues to find which candidate matches your views. See your percentage match with 3 candidates.
Use Tool →Electoral College Simulator
Click states to assign electoral votes to candidates. Live 270-vote tracking with a full interactive US state grid map.
Use Tool →View All Tools
Browse the complete collection of free tools & calculators across all categories.
All Tools →Why logixwire?
We build simple, focused online tools that solve real problems. No bloat, no data collection, no tracking. Just clean, fast utilities that respect your privacy.
Privacy First
All processing happens in your browser. We never see or store your data.
Fast & Lightweight
No frameworks, no tracking scripts, no bloat. Each tool is a single HTML file that loads instantly.
Works Everywhere
Fully responsive on desktop, tablet, and mobile. Print-friendly output included on every tool.
Built with Modern Web Tech
Self-contained HTML files with 3D visuals, smooth animations, and semantic markup. Fast, accessible, maintainable.
Latest Articles
Guides, tips, and insights on using our tools and related topics.
How to Use Discord Timestamps: Complete Guide
Learn all 7 Discord timestamp formats, best practices for event announcements, and how to create codes for any timezone.
Read More →How to Split Bills Fairly: The Complete Guide
Equal split vs itemized split, handling tax and tip proportionally, and strategies for group payments without awkwardness.
Read More →Stripe Fees Explained: What Every Business Should Know
Understand Stripe's fee structure, forward vs reverse calculation, and tips for minimizing payment processing costs.
Read More →How Compound Interest Actually Works
Compound interest without the jargon. Real examples, monthly contributions, and why starting early beats investing more every time.
Read More →How to Check Password Strength
A practical guide to password entropy, crack time, and why length beats complexity. Includes real-world examples and passphrase tips.
Read More →How Much Paint Do You Actually Need?
Real paint coverage math with door/window deductions. Stop overbuying gallons and start calculating exactly what your room needs.
Read More →Percentage Calculator — How to Calculate Percentages Fast and Accurately
Learn how to calculate percentages: find percent of a number, what percent one number is of another, and reverse percentages with real-world examples.
Read More →BMI Calculator — How to Calculate and Interpret Your Body Mass Index
Calculate your BMI, understand WHO categories, and learn the limitations for athletes and different ethnic groups.
Read More →How to Use a Voter Guide Quiz to Make Informed Decisions
Match your views with candidates on the issues that matter most. Learn how issue-based quizzes help voters make informed decisions.
Read More →How the Electoral College Works — An Interactive Guide
Understanding 270 electoral votes and the path to the presidency. Simulate different scenarios and see how states shape the outcome.
Read More →Sales Commission & Tiered Bonus Tracker — Calculate Variable Compensation
Learn how tiered commission structures work, how to calculate quota attainment across multiple bonus tiers, and how to model total variable compensation with real sales examples.
Read More →Cold Email ROI Modeler - Pipeline Strategy for Outbound Campaigns
Learn how to model your cold email outbound pipeline: delivery rates, open rates, reply rates, meeting booking, and close rates - and how to identify the biggest leak in your campaign.
Read More →Digital Product Pricing & Tier Optimizer - Van Westendorp Pricing Guide
Learn how the Van Westendorp Price Sensitivity Meter works. Find the optimum price point, range of acceptable prices, and build Basic/Pro/Enterprise tiers that maximize revenue.
Read More →Frequently Asked Questions
Quick answers to common questions about our tools and how they work.
Are these tools really free?
Yes — every tool on logixwire is completely free. No hidden charges, no premium tiers, no credit card required. They'll always be free.
Do you store my data?
Never. All calculations happen in your browser using JavaScript. We don't have servers, databases, or tracking scripts. Your data never leaves your device.
How do the tools work?
Each tool is a self-contained HTML file with embedded CSS and JavaScript. Open the page, use the tool, close it — no downloads, no installs, no account needed.
Do they work on mobile?
Absolutely. All tools are fully responsive and work on any device — desktop, tablet, or phone. They also include print-friendly output.
Do I need to install or download anything?
No, you don't need to install or download anything. Every tool on logixwire is a web application that runs directly in your web browser. Just visit the page and start using it.
Are these tools safe and secure?
Absolutely. Since all calculations and processing happen locally in your browser using JavaScript, your data never travels over the internet to any server. This makes logixwire completely safe, secure, and private.
Can I print results or save them as PDF?
Yes. All our tools include printer-friendly stylesheets. You can use your browser's Print function (Ctrl+P or Cmd+P) to print the page or save it directly as a PDF. The layout automatically hides headers, footers, and background styling to save ink and look professional.
What tools are coming next?
We're working on new tools regularly. Have an idea? Reach out via our Contact page — we'd love to hear it.
How can I get help?
Visit our Contact page and send us a message. We respond within 24 hours. You can also email us directly at contact@logixwire.com.