IP Subnet Calculator
Calculate subnet masks, CIDR notation, usable host counts, broadcast addresses and full network ranges from any IPv4 address.
Open tool →Free, engineering-grade calculators for infrastructure professionals.36 Live54 Total14 Categories
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Calculate subnet masks, CIDR notation, usable host counts, broadcast addresses and full network ranges from any IPv4 address.
Open tool →Plan and document VLAN segmentation, trunk assignments and inter-VLAN routing for structured network designs.
Open tool →Query live DNS records for any domain. Check A, AAAA, MX, TXT, CNAME, NS and SOA records in real time using Cloudflare DNS over HTTPS.
Open tool →Identify the vendor behind any MAC address. Paste any format to get the OUI prefix, manufacturer name, address type and administration scope.
Open tool →Calculate IPv6 subnets, prefix lengths and address ranges for dual-stack environments.
Coming soonCalculate exact patch cord lengths for rack-to-rack and device connections with metric/imperial support and slack allowance.
Open tool →Estimate total cable quantities including pulls, drops and waste factors for horizontal and vertical distribution.
Open tool →Estimate patch cord length for same-rack and row-to-row routing using rack spacing, vertical travel, manager allowance and slack.
Open tool →Calculate practical conduit fill percentage from cable outside diameter, cable quantity, conduit internal diameter and target fill.
Open tool →Calculate total dB loss across a fiber link. Add cable sections, connector pairs, splices and passive components. Check margin vs system budget and export the full link list.
Open tool →Calculate cable tray fill percentage from cable outer diameters and quantities. Track mixed cable types, check against NEC 392 / IEC 61537 limits and export the cable schedule as CSV or Excel.
Open tool →Visually plan equipment placement in 19" and 23" racks with U-space tracking, front-to-rear clearance and cable management zones.
Coming soonBuild up rack mass, combine point loads per EN 12825 panel-grid rules and check static, dynamic/installation and slab area load against your raised floor.
Open tool →Calculate Power Usage Effectiveness and compare against ASHRAE and Green Grid benchmarks for data centre efficiency tracking.
Open tool →Interactive reference guide for TIA-942 Tier I–IV requirements covering power, cooling and structural criteria.
Coming soonCalculate total rack power draw, current per phase and PDU sizing from individual equipment entries with real-time totals.
Open tool →Size a UPS system by VA/kVA requirement and calculate expected battery runtime under varying load percentages.
Open tool →Plan N, N+1, 2N and 2(N+1) power path redundancy for critical IT loads.
Coming soonSize a battery bank for UPS, data centre or home backup. Enter load list, DC bus voltage, battery type and derating factors — get required Ah, total batteries, series/parallel strings and runtime verification.
Open tool →Planning-level diesel genset sizing per ISO 8528 — power class (ESP/PRP/COP), kVA from load, altitude/temperature derating, output current and fuel autonomy.
Open tool →Estimate technical-room and server-room cooling demand in kW, BTU/h and tons, including IT load, UPS losses, lighting, people, safety margin, airflow and cooling-failure temperature-rise guidance.
Open tool →Build a rack load list and calculate required airflow (CFM / m³/h), cooling tons and ASHRAE operating class for server rooms and data centres. Includes altitude derating and design margin.
Open tool →Convert between BTU/hr, tons of refrigeration, kW and kCal/hr for cooling capacity planning across international standards.
Open tool →Size precision air conditioning units based on IT load, sensible heat ratio and redundancy requirements.
Open tool →Verify if server inlet conditions meet ASHRAE A1–A4 / X1–X2 equipment environment classes.
Open tool →Select correct AWG or mm² wire size based on load current, voltage, run length and insulation rating to NEC/IEC standards.
Coming soonCalculate voltage drop percentage for single-phase and three-phase circuits over given cable lengths and loads.
Open tool →Calculate total circuit load, diversity factors and breaker sizing for multiple connected loads.
Open tool →Estimate residential electrical material categories, cable length buckets, circuit groups, floor sub-panels, panel module needs and electrician discussion notes.
Open tool →Planning-level material buckets for industrial installations — three-phase cable quantities, sub-distribution boards, cable tray/busway containment, motor circuits and earthing/bonding.
Open tool →Calculate derated cable ampacity per NEC 310.15 / IEC 60364-5-52. Build a circuit list with AWG or mm² conductors, select temperature rating, ambient temperature and conduit fill — get final derated ampacity and recommended breaker size.
Open tool →Convert between apparent power (kVA), real power (kW), current (A) and voltage for single-phase and three-phase systems, with power factor.
Open tool →Check gG fuse or MCB coordination with the conductor per IEC 60364-4-43 — IB ≤ In ≤ IZ and I₂ ≤ 1.45·IZ.
Open tool →Calculate electricity consumption and running cost per device — your own kWh rate, choice of currency, optional solar feed-in for net cost.
Open tool →Total cost of ownership for a server room / small data center — CapEx (IT + infrastructure) and OpEx (power via PUE, staffing, space) over multiple years, per rack and per kW.
Open tool →Facility power, cooling and running cost for GPU/AI workloads — GPU TDP × count × server overhead × PUE, rack density with an air/liquid-cooling verdict, and annual cost at your own kWh rate.
Open tool →Estimate CO₂ emissions from IT infrastructure based on power consumption and regional grid emission factors.
Coming soonBuild structured project scope documents with effort estimation, material lists and timeline milestones.
Coming soonBuild itemised cost proposals for installation projects including labour, materials and margin calculation.
Coming soonEstimate capital expenditure for infrastructure refresh or new builds across structured cabling, rack, power and cooling.
Coming soonSize a solar PV array for off-grid or hybrid use based on load profile, location irradiance and battery capacity.
Coming soonDesign a battery bank for off-grid or UPS applications including cell count, string voltage and autonomy calculation.
Coming soonCalculate total home electrical load, select consumer unit size and check against supply capacity.
Coming soonPlan home network topology: router placement, AP coverage, switch locations and cable runs room by room.
Coming soonSelect the right consumer or small office UPS size for your PC, NAS or home lab equipment.
Coming soonEstimate incident energy and arc flash boundary for LV/MV panels based on system impedance and protective device clearing time.
Coming soonSelect the correct PPE category for electrical work tasks based on NFPA 70E and IEC 61482 standards.
Coming soonVerify earthing conductor sizing and ground resistance requirements to IEC 60364 and NEC Article 250.
Coming soonCheck whether a PoE switch can power all connected devices — device list by IEEE 802.3af/at/bt class, cable loss, headroom reserve and thermal derating against the switch PoE budget.
Open tool →Calculate network bandwidth for IP camera systems — resolution, frame rate, codec (H.264/H.265/H.265+), scene complexity and camera count, with uplink check.
Open tool →Calculate NVR/CCTV storage — cameras, resolution, codec, recording mode and retention, with usable-capacity and RAID overhead.
Open tool →Calculate camera field of view, detection distance and identification distance for different lens focal lengths.
Coming soonCalculate EV charging time, energy and cost for consumer wallbox charging, or size grid-connection capacity for a multi-point commercial charging site.
Open tool →Enter your circuits and generate a print-ready single- or three-phase distribution-board diagram with circuit schedule as PDF. IEC 60364 / HD 60364 documentation aid — not installation guidance.
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Subnet calculators, VLAN planning, IP addressing and network topology tools for structured LAN/WAN design.

Cable length calculators, patch cord planners, conduit fill tools and TIA-568 / ISO 11801 reference guides for professional cabling installations.

Rack unit planners, PUE calculators and TIA-942 reference tools for data centre design and capacity management.

Rack power density calculators, UPS sizing, battery runtime and redundancy planning tools for critical power systems.

CRAC/CRAH sizing, BTU/kW conversion, ASHRAE envelope checks and airflow management tools for data centre thermal design.

Wire gauge selectors, circuit load calculators, conduit fill tools and voltage drop estimators for LV electrical installation design.

Energy consumption and electricity cost calculators, TCO analysis and carbon footprint estimators for infrastructure operation.

Project scoping, resource estimators, proposal calculators and timeline tools for IT infrastructure project planning and tendering.

Solar PV sizing, generator selection, battery bank calculators and hybrid system planning tools for sustainable and resilient power.

Home network design, consumer UPS sizing, small office electrical load calculators and residential structured cabling tools.

Arc flash incident energy calculators, PPE selection tools, earthing/grounding checks and electrical safety reference guides.

CCTV camera coverage planners, IP video bandwidth calculators, NVR storage estimators and access control system design tools.

EV charging time, cost and grid-connection sizing calculators for consumer wallboxes and commercial multi-point charging sites.

Fusebox and distribution board diagram generators, circuit schedules and printable installation documentation aids.
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