Life Tools
Practical calculators for size conversions, tire pressure, and materials
Category overview
Life tools cover everyday estimates such as BMI, fuel costs, electricity usage, battery time, tips, book spine width, box volume, and pet age. Items that may affect cost or health decisions are labeled as reference calculations rather than final advice.
Results can vary by region, pricing plan, personal condition, and product specification. Adjust inputs carefully and compare important results with official bills, manuals, or professional guidance.
Currently showing 40 reviewed tools, including Fuel Cost Calculator, Electricity Bill Calculator, Battery Runtime Calculator, Tip Calculator, Book Spine Thickness Calculator.
Life Tools List
- Fuel Cost Calculator - Estimate fuel cost from driving distance, fuel economy, and fuel price.
- Electricity Bill Calculator - Estimate a monthly electricity bill from power consumption in kWh.
- Battery Runtime Calculator - Estimate runtime from battery capacity in mAh and device current draw.
- Tip Calculator - Calculate tip amount, total payment, and per-person split from a bill and tip rate.
- Book Spine Thickness Calculator - Calculate printed book spine thickness from page count and paper thickness.
- Box Volume Calculator - Calculate box volume, surface area, and shipping dimensional weight from width, depth, and height.
- Pet Age Calculator - Convert dog or cat age into an approximate human-age equivalent.
- BMI Calculator - Calculate body mass index and a normal-weight range from height and weight.
- BMR Calculator - Estimate daily basal metabolic rate from sex, age, height, and weight.
- Calorie Calculator - Estimate maintenance, weight-loss, and weight-gain calories from BMR and activity level.
- Water Intake Calculator - Estimate daily water intake from body weight and a per-kg hydration rule.
- Caffeine Intake Calculator - Add up caffeine from drinks and compare daily intake against common guidance limits.
- Walking Calorie Calculator - Estimate calories burned from walking based on weight, distance, and pace.
- Running Pace Calculator - Calculate pace from distance and time, or estimate finish time from pace.
- Moving Box Calculator - Estimate how many moving boxes you need from home size, room count, and packing density.
- Food Storage Memo - Record food items, storage places, and dates to estimate expiration or use-by reminders.
- Tire Pressure Converter - Convert tire pressure between psi, bar, and kPa and compare common vehicle presets.
- Screen Size Compare - Compare display sizes by diagonal, aspect ratio, width, height, and screen area.
- Travel Budget Splitter - Split travel expenses by people and categories to estimate each person's share.
- Checklist Generator - Create a practical checklist from a topic or item list for trips, moving, shopping, or tasks.
- Shoe Size Converter - Compare shoe sizes across Korea, US, UK, EU, Japan, and foot length.
- Ring Size Converter - Convert ring size between Korean, US, UK, EU, circumference, and diameter values.
- Clothing Size Converter - Compare clothing sizes across global, Korean, US, EU, and measurement-based standards.
- Cooking Unit Converter - Convert common cooking units such as cups, tablespoons, teaspoons, mL, and grams.
- Recipe Scaler - Scale recipe ingredient amounts by changing servings or applying a multiplier.
- Baking Pan Converter - Compare baking pan sizes and calculate batter scaling by pan area.
- Paint Calculator - Estimate paint amount from wall area, coverage, and number of coats.
- Tile Calculator - Estimate tile count and material cost from area, tile size, and waste rate.
- Wallpaper Calculator - Estimate wallpaper rolls from wall dimensions, roll size, and waste.
- Curtain Size Calculator - Estimate curtain width and length from window size, fullness, and hanging style.
- TV Viewing Distance Calculator - Estimate comfortable viewing distance from TV size and resolution.
- Furniture Fit Calculator - Check whether furniture can fit through doors, elevators, hallways, or room spaces.
- Flashlight - Turn your screen into a bright light source with color and brightness controls.
- Online Metronome - Set BPM and hear precise beats with visual feedback using Web Audio API.
- Spirit Level - Measure tilt using your device's orientation sensor to check horizontal and vertical alignment.
- Decibel Meter - Measure ambient noise level (dB) in real time using your microphone.
- Korean Family Relation Calculator - Select a family relationship to see the Korean kinship degree (촌수) and proper title.
- Wire Gauge Converter - Convert between AWG and mm² wire gauges with diameter, resistance, and ampacity reference.
- Resistor Color Band Calculator - Select color bands to calculate the resistance value (Ω) and tolerance.
- Resistance to Color Band Calculator - Enter a resistance value to see the matching color band combination.