All tools

Cups to Grams Converter (100+ Ingredients)

Convert cups, tablespoons and teaspoons to grams for over 100 specific baking and cooking ingredients.

Recipe Scaler — Scale Ingredients by Servings

Paste any recipe and instantly scale every ingredient by servings or multiplier, with smart fraction rounding.

Oven Temperature Converter (°F, °C, Gas Mark, Fan)

Convert any oven temperature between Fahrenheit, Celsius, fan-assisted and gas marks 1–9 with doneness charts.

Yeast Converter — Fresh, Active Dry, Instant

Convert between fresh, active-dry, instant and rapid-rise yeast by weight or volume with sourdough starter equivalents.

Spice Blend Calculator (Curry, Cajun, Garam Masala, Taco)

Scale and customise classic spice blends — curry powder, cajun, taco, garam masala, pumpkin spice and more.

Sous Vide Time & Temperature Calculator

Recommended sous vide temperature and time by protein, thickness and doneness, with pasteurisation safety.

Oven to Air Fryer Converter

Convert any oven recipe to air-fryer time and temperature using the -25°F / -20% rule plus food-specific overrides.

Slow Cooker, Instant Pot & Oven Time Converter

Convert recipes between slow cooker (low/high), pressure cooker and oven cook times.

Coffee Brewing Ratio Calculator (Pour Over, Espresso, French Press)

Calculate exact coffee and water ratios for pour over, espresso, AeroPress, French press and cold brew.

Cocktail Recipe Scaler (Batch Cocktails)

Scale any cocktail recipe to batch size, with dilution and chilling adjustments for parties.

Alcohol ABV Dilution Calculator

Dilute any spirit, wine or beer to a target ABV by adding water, juice or other liquid.

BPM to Milliseconds Delay Calculator

Convert BPM to milliseconds, Hz and seconds for every note value — 1/1 down to 1/64 triplets and dotted notes.

Sample Rate & Bit Depth File Size Calculator

Estimate audio file size from sample rate, bit depth, channels and duration for WAV, AIFF and FLAC.

Musical Note Frequency Calculator (Hz)

Convert any note to frequency in Hz across all octaves, with custom A4 tuning and cents detuning.

Loop Length Calculator (Bars to Seconds)

Convert bars or beats to seconds or samples at any BPM and time signature for perfect loops.

Sidechain Compression Timing Calculator

Calculate sidechain attack and release times in ms synced to BPM and note divisions for pumping mixes.

Freelance Hourly to Project Rate Calculator

Convert your hourly rate to a fixed project quote, with revision buffers, expense and profit markup.

Day Rate to Annual Salary Calculator

Convert freelance day rates to equivalent annual employed salary, factoring billable days, tax and benefits.

Freelance Currency & Tax-Adjusted Rate Converter

Convert a client-currency invoice to your take-home in your local currency after tax and FX fees.

Pixels to cm / Inches Converter (Print DPI)

Convert pixel dimensions to physical print size at any DPI/PPI, with bleed and safe-zone helpers.

Typography Scale Generator (Modular Type Scale)

Generate a modular type scale in rem, px and em from any base size and ratio, with line-height pairs.

Color Converter — HEX, RGB, HSL, OKLCH & Contrast

Convert any color between HEX, RGB, HSL, HWB, OKLCH and LCH, with WCAG contrast checking against any background.

Aspect Ratio Resizer (Image, Video, Social)

Resize any dimensions while keeping aspect ratio, with presets for Instagram, TikTok, YouTube and cinema formats.

FPS to Frame Time (ms) Calculator

Convert FPS to milliseconds per frame and compare any two refresh rates — 30, 60, 144, 240, 360 Hz.

Mouse Sensitivity Converter (Valorant, CS2, Apex, Fortnite)

Convert mouse sensitivity between games at matched DPI — Valorant, CS2, Apex, Overwatch, Fortnite, Rainbow Six.

Streaming Bitrate Calculator (Twitch, YouTube, Kick)

Recommended bitrate, resolution and encoder settings for Twitch, YouTube Live, Kick and TikTok Live.

Twitch Subs, Bits & Revenue Calculator

Estimate streamer payout from subs (tier 1/2/3), bits and ads, with split, currency and tax breakdown.

3D Filament Length, Weight & Cost Calculator

Convert between filament length, weight and cost for PLA, PETG, ABS, TPU and more at 1.75mm or 2.85mm.

Resin Print Volume & Cost Calculator

Convert STL model volume to resin weight and bottle cost for Anycubic, Elegoo, Siraya and Phrozen.

3D Print Total Cost Estimator (Filament + Time + Markup)

Calculate full print cost: filament, electricity, machine wear, failure rate and labour markup. Etsy-ready price.

One Rep Max (1RM) Calculator + % Chart

Estimate your 1RM with 5 formulas (Epley, Brzycki, Lombardi, O'Conner, Wathan) and a full %1RM training chart.

Barbell Plate Loading Calculator (kg / lb)

Plate math for any target weight, with available plate inventory, in kg or lb — for Olympic, women's and trap bars.

Wilks, DOTS & IPF GL Powerlifting Score Calculator

Compare powerlifting totals across weight classes with Wilks, DOTS and IPF GL coefficients.

Macros from Calories Calculator (P / F / C in g)

Calculate grams of protein, fat and carbs from any calorie target with keto, balanced and high-protein presets.

Heart Rate, FTP & Pace Training Zone Calculator

Generate Z1–Z5 training zones from threshold heart rate, FTP or threshold pace for running, cycling and rowing.

Running Pace Converter & Race Time Predictor

Convert running pace between min/km and min/mi and predict your 5K, 10K, half and full marathon times.

Cycling Power to Speed Calculator

Estimate cycling speed from watts using bike weight, gradient, wind and surface drag.

ABV Calculator (OG → FG + Refractometer)

Calculate beer ABV from original and final gravity, with refractometer correction and attenuation %.

IBU Hop Bitterness Calculator (Tinseth & Rager)

Calculate IBUs from boil time, gravity, hop AA% and batch size using Tinseth or Rager utilisation.

Grain Bill, Mash & Strike Water Calculator

Plan a beer recipe: fermentables percentages, predicted OG, SRM colour, mash and strike water volumes.

Priming Sugar Calculator (Bottle Carbonation)

Grams of priming sugar for target CO₂ volumes by style, batch size and temperature.

Concrete Volume & Bags Calculator

Cubic yards / metres of concrete needed for slabs, footings, columns and posts, plus bags-of-mix conversion.

Paint Coverage Calculator (Litres / Gallons)

Litres or gallons of paint needed by wall area, coats, primer and surface texture coverage.

Lumber Board Feet & Cost Calculator

Calculate board feet, linear feet and total cost for hardwood and softwood lumber.

Tile & Flooring Coverage Calculator

Tiles or boxes needed for any floor or wall area, with pattern waste and grout lines.

BTU & HVAC Sizing Calculator

BTUs needed to heat or cool a room from area, ceiling height, insulation, climate and sun exposure.

Crop Factor & Equivalent Focal Length Calculator

Convert focal length and aperture between sensor sizes — Full Frame, APS-C, M43, 1" and medium format.

Hyperfocal Distance & Depth of Field Calculator

Calculate hyperfocal distance and near/far DOF limits for any focal length, aperture and sensor size.

Video Bitrate & File Size Calculator (H.264, H.265, AV1)

Calculate video file size from bitrate, resolution, FPS and duration for H.264, H.265, AV1 and ProRes.

Exposure Triangle Calculator (ISO, Shutter, Aperture)

Calculate equivalent exposures across aperture, shutter speed and ISO with reciprocal stops.

Cron Expression Builder & Translator

Build cron expressions visually and translate any cron string to plain English with the next 5 fire times.

Unix Timestamp Converter (with Timezone)

Bidirectional Unix timestamp ↔ human date converter with timezones, milliseconds and ISO 8601.

Bandwidth & Download Time Calculator (Mbps ↔ MB/s)

Convert Mbps to MB/s and calculate download time for any file size at any internet speed.

Regex Tester with Plain English Explainer

Test regular expressions live with match highlighting and a plain English breakdown of every part of the pattern.

E-Liquid Nicotine Mixing Calculator

Mix DIY e-liquid: nicotine base, PG, VG and flavour for any target strength and PG/VG ratio.

PG/VG Ratio Calculator (Max VG)

Calculate the achievable PG/VG ratio of your DIY e-liquid given nicotine base and flavour PG/VG content.

Knitting Gauge Converter

Convert stitches per inch / cm and adjust pattern stitch counts for your actual tension.

Crochet Hook Size Converter (US / UK / Metric / Japan)

Convert crochet hook sizes between US letter, UK number, metric mm and Japanese systems.

Fabric Yardage Calculator

Yards or metres of fabric needed for any garment or project by size, fabric width and nap.

Dog Food Portion Calculator (Calories & Cups)

Daily calories and cups / grams of food for your dog by weight, age, activity and food brand.

Aquarium Fish Stocking Calculator

Tank volume from dimensions plus realistic fish stocking guidance — better than "1 inch per gallon".

Aquarium Water Parameter Converter

Convert aquarium water parameters — ppm, dGH, dKH, °C / °F and meq/L — with species presets.

Sleep Cycle Bedtime & Wake Calculator

Bedtime and wake-up times aligned to 90-minute sleep cycles, accounting for fall-asleep latency.

Password Strength & Entropy Calculator

Calculate password entropy in bits and estimated brute-force time across attacker capabilities.

Bra Size Converter (UK / US / EU / AU / JP)

Convert bra sizes between UK, US, EU, AU and JP systems with sister sizes when band/cup doesn't fit.

Shoe Size Converter (US / UK / EU / JP / CN)

Convert shoe sizes between US, UK, EU, Japanese cm and Chinese systems for men, women and kids.

Battery Life Runtime Calculator (mAh)

Calculate how long a battery lasts at a given current draw — mAh to hours, Wh, and screen-on time.

Fertilizer / Nutrient Dilution Calculator

Dilute liquid fertiliser concentrate to target PPM or EC for soil and hydroponics.

Paper Size Converter (A4 / Letter / B-Series / JIS)

Convert between ISO A/B/C, US Letter / Legal / Tabloid and Japanese JIS paper sizes in mm and inches.

Font Size Converter (pt, px, rem, em, %)

Convert font sizes between pt, px, rem, em and % for web and print typography.

Time Zone Overlap Calculator (Remote Teams)

Find overlapping productive hours across up to 8 time zones for distributed teams.

Word Count to Pages Converter (Book / Essay / Manuscript)

Estimate pages from word count by genre, font, size and spacing — novel, essay, manuscript, blog.

Podcast Episode Length Optimiser

Recommended podcast episode length by topic and audience plus file size estimates.

Grow Light Distance Calculator

Calculate grow light intensity drop-off (PPFD / lux) by distance using the inverse square law.

Custom Unit Converter (Build Your Own)

Define your own units of measurement and save them — perfect for niche workflows.

Sticker / Decal / Vinyl Size & Cost Calculator

Calculate real-world size from a digital design and sticker cost per unit for Etsy and Cricut sellers.

LED Series Resistor Calculator (Ohm's Law)

Calculate the right series resistor for an LED given supply voltage, forward voltage and current.

Tire Size Comparison Calculator (Plus Sizing)

Compare two tire sizes for diameter, circumference, speedometer error and clearance.