AdapterGuru
Know before you plug in
14 INTERACTIVE TOOLS · 100% CLIENT-SIDE

Power Supply Tools & Directory

Find the exact calculator, connector identifier, or safety evaluator for your electrical equipment.

Showing 14 of 14 tools
Quick Jump:Check a Router Adapter →Find Barrel Plug Size (OD/ID) →Verify Polarity (⊕ / ⊖) →Charge Phone with Laptop Brick? →Calculate Wire Voltage Drop →Size CCTV Camera Power Box →
Flagship UniversalΔV = 0 · I_adapt ≥ I_dev · Polarity ⊕

Adapter Compatibility Checker

The master evaluation engine. Compares voltage, amperage capacity, DC barrel dimensions (OD × ID), and polarity in real-time.

SmartphonesFast Charge: 20W – 45W PD / PPS

Mobile Phone Charger Checker

Can you charge your phone with a 65W/100W laptop charger? Immediate safety verdicts, speed curves, and battery protection checks.

Laptops19.0V ≈ 19.5V ≈ 20.0V (±2.6%)

Laptop Charger Checker

Check replacement Dell, HP, Lenovo, Apple, and Asus chargers. Evaluates wattage, 19.5V tolerance, and central smart ID pins.

Networking12V / 9V DC · Center Positive ⊕

Router & Modem Adapter Checker

Verify replacement power supplies for TP-Link, Netgear, ASUS, Linksys, Google Nest, and optical fiber ONTs.

SecurityI_total = (N_cams × I_night) + I_DVR

CCTV Power Supply Sizer

Calculate 12V DC power distribution box amperage for 4, 8, or 16-channel security cameras with IR night-vision LED surge.

USB-C StandardsUSB-PD 3.0 / 3.1 EPR (Up to 240W)

USB-C PD & Protocol Checker

Validate USB Power Delivery profiles (5V–48V EPR), Samsung 45W PPS Super Fast Charging, and 5A E-Marker cable limits.

Voltage AnalysisΔV% & V_drop = 2 × L × R × I

Voltage Calculator & Drop Analyzer

Evaluate voltage tolerance compliance (standard ±5% guideline for many devices) and calculate DC line voltage loss across wire gauge (AWG) and run distance.

Wire Drop & SizingV_drop = 2 × L × R_awg × I

DC Wire Gauge (AWG) Calculator

Calculate voltage loss, loop resistance, and maximum safe current ampacity for 5V, 12V, 24V, and 48V DC cables.

Load SizingI_rec = I_total ÷ 0.8 (80% Continuous Duty Sizing Guideline)

Current & Splitter Load Calculator

Size adapter amperage with the 80% continuous duty recommendation and sum loads for devices sharing a multi-way DC splitter.

Power RatingWatts = Volts × Amps (W = V × A)

Wattage Calculator

Calculate total electrical power output in Watts, 24/7 continuous energy consumption (kWh/month), and operating costs.

Current DrawAmps = Watts ÷ Volts (A = W / V)

Volts to Amps Converter

Determine required electrical current draw in Amperes or Milliamperes from known wattage and operating voltage with 80% headroom.

Power ConsumptionWatts = Amps × Volts (P = I × V)

Amps to Watts Calculator

Convert Amps or milliamps (mA) into electrical Watts and compute 24/7 power consumption for smart electronics.

Plug SizingOuter Diam. (OD) × Inner Pin (ID)

DC Barrel Connector Finder

Interactive plug finder by Outer Diameter (OD) and Inner Pin (ID). Includes live SVG cross-section diagram and EIAJ codes.

Polarity SafetyCenter Positive ⊕ vs Center Negative ⊖

DC Polarity Checker & Decrypter

Instantly verify DC polarity schematic symbols printed on bricks and devices to prevent instantaneous reverse-polarity blowouts.