Best Free Online Calculators in 2025
Twitch Username Availability Checker Check if a Twitch username is available before creating your account twitch.tv/ Check Availability Enter a username between 4-25 characters (letters, numbers, underscores) Result Checking username availability… Suggested Available Usernames: Why Check Twitch Username Availability? Choosing the right Twitch username is crucial for your streaming brand. … Read more
Free Image Size Reducer Make your images smaller in KB/MB without losing quality. Perfect for websites and social media. Drag & drop your image here or Select Image Adjust Size Settings Target Size: 300 KB Quality: 80% Original Image 0 KB Resized Image 0 KB Download Resized Image How to … Read more
PHP Syntax Checker Check your PHP code for errors. Paste your code below and click “Check Syntax”.
Twitch Username Checker Find out if a Twitch username is available. Check instantly before creating your channel. Check Availability Usernames must be 4-25 characters (letters, numbers, underscores) username Claim on Twitch Copy Username About Twitch Usernames Twitch usernames are unique. Once taken, no one else can use them. Good usernames … Read more
Refrigerant Charge Calculator Calculate the correct refrigerant amount for your system. Fill in your equipment details below. Get precise results. Line Set Length (ft) Line Set Size Select size3/8″ liquid line1/4″ liquid line1/2″ liquid line Unit Capacity (tons) Refrigerant Type Select typeR-22R-410AR-134aR-404A Factory Charge (oz) Calculate Charge Refrigerant Charge Results … Read more
Subcooling Calculator Measure your refrigerant’s subcooling level. Enter your system measurements below. Get accurate results instantly. Liquid Line Temperature (°F) Saturation Temperature (°F) Refrigerant Type Select refrigerantR-22R-134aR-404AR-410AR-407COther Calculate Subcooling Subcooling Results Subcooling Value: 0 °F System Status: – What This Means 0-5°F: Low subcooling (Possible undercharge) 6-12°F: Ideal range (Proper … Read more
Cooling Load Calculator Estimate the cooling capacity needed for your space. Get results in BTU/hr and tons. Room Information Room Length (ft) Room Width (ft) Ceiling Height (ft) Number of People Environmental Factors Climate Zone Hot/HumidWarmModerateCool Sun Exposure Heavy SunModerate SunShaded Insulation Quality PoorAverageExcellent Appliance Heat (watts) Calculate Cooling Load … Read more
Manual D Duct Sizing Calculator Calculate proper duct sizes for HVAC systems. Based on ACCA Manual D standards. System Information Airflow (CFM) Duct Type Flexible DuctSheet MetalFiberglass Duct Friction Rate (in. wg/100ft) 0.08 (Low Velocity)0.1 (Standard)0.12 (High Velocity) Duct Dimensions Duct Shape RoundRectangular Diameter (inches) Width (inches) Height (inches) Duct … Read more
Manual J HVAC Load Calculator Estimate heating and cooling loads for residential buildings. Follows ACCA Manual J standards. Building Information Total Square Footage (ft²) Average Ceiling Height (ft) Climate Zone 1 – Very Hot2 – Hot3 – Warm4 – Mixed5 – Cool6 – Cold7 – Very Cold Construction Details Wall … Read more
Elden Ring Rune Calculator | Plan Your Character Leveling ELDEN RING RUNE CALCULATOR Plan your character progression and calculate exact rune requirements ✠ Current Level: Target Level: Current Runes: ?Enter how many runes you currently have (optional) Calculate Runes Needed RUNES REQUIRED TOTAL RUNES NEEDED 0 RUNES TO COLLECT 0 … Read more