🧮 常用计算器Everyday Calculators （第 2 页）(page 2)
茶匙转克（烹饪）Tsp to g (Cooking)
按食材密度把美制茶匙换成克（1 tsp ≈ 4.9289 ml）。可设置「茶匙」、「食材」、「自定义 g/tsp（可选）」。US teaspoons → grams by density (1 tsp ≈ 4.9289 ml). Settings: Teaspoons, Ingredient, Custom g per tsp (optional).
克转升（按密度）Gram to Liter (by Density)
质量 ÷ 密度 → 体积（默认水 1000 g/L）。可设置「克」、「密度 g/L」。Mass ÷ density → volume (default water 1000 g/L). Settings: Grams, Density g/L.
克转毫升（按密度）Gram to Milliliter (by Density)
质量 ÷ 密度 → 毫升（默认水 1 g/ml）。可设置「克」、「密度 g/ml」。Mass ÷ density → ml (default water 1 g/ml). Settings: Grams, Density g/ml.
千克转升（按密度）Kg to Liter (by Density)
质量 ÷ 密度 → 升（默认水 1 kg/L）。可设置「千克」、「密度 kg/L」。Mass ÷ density → litres (default water 1 kg/L). Settings: Kilograms, Density kg/L.
磅转加仑（水）Lb to Gal (Water)
水的磅数 → 美制加仑。可设置「磅」、「密度 kg/L」。Pounds of water → US gallons. Settings: Pounds, Density kg/L.
克转茶匙（烹饪）Grams to Teaspoons (Cooking)
按密度把克换成美制茶匙。可设置「克」、「食材」、「自定义 g/tsp（可选）」。Grams → US teaspoons by density. Settings: Grams, Ingredient, Custom g per tsp (optional).
植物间距计算器Plant Spacing Calculator
按苗床长宽、株距和行距算出能种多少棵：方形网格（逐行对齐）给出实际可放下的株数，三角形（交错）排列给出按面积估算的株数（约多 15%）。Work out how many plants fit in a bed from its length, width, plant spacing and row spacing: the exact count for a square grid, and an area-based estimate for a triangular (staggered) layout, which fits about 15% more.
草籽用量计算器Grass Seed Calculator
按草坪面积、草种和播种方式（新建草坪或补播）计算需要多少草籽，以及按包装规格需要几袋；内置常见草种的示例播种量，也可填写种子袋上的推荐用量。Work out how much grass seed you need from the lawn area, grass type and whether you are seeding a new lawn or overseeding, and how many bags to buy — with example rates for common grasses, or the rate printed on your seed bag.
铺路砖用量计算器Paver Calculator
按铺装面积、砖块尺寸、缝宽和损耗率计算需要多少块铺路砖，以及碎石垫层和找平砂的体积（立方码 / 立方米）。Work out how many pavers you need from the patio area, paver size, joint width and waste allowance, plus the volume of gravel base and bedding sand (cubic yards / cubic meters).
甲板地板用量计算器Decking Calculator
按甲板长宽、板宽、板缝和板长计算需要多少块面板、龙骨数量和螺钉数，含损耗；面板沿长度方向铺设，龙骨垂直于面板按间距排布。Work out deck boards, joists and screws from the deck size, board width, gap and board length, with waste: boards run along the length and joists run across them at the chosen spacing.
挡土墙砌块计算器Retaining Wall Calculator
按挡土墙长度、高度和砌块尺寸计算砌块和压顶块数量，可加一层埋入地下的底层，并估算基础碎石和墙后排水碎石的体积。Count retaining wall blocks and cap blocks from the wall length, height and block size, with an optional buried first course, plus the gravel for the base trench and the drainage zone behind the wall.
窗帘尺寸计算器Curtain Size Calculator
按窗户宽高、窗帘杆超出窗框的长度、褶皱倍数和下摆位置，算出窗帘总宽度、每片宽度和长度，并给出最接近的常见成品长度。Work out curtain width per panel and length from the window size, how far the rod extends past the frame, the fullness and where the hem should fall — with the nearest common ready-made length.
土地面积（英亩）计算器Acreage Calculator
计算地块面积并换算成英亩、公顷、平方英尺和平方米：支持矩形、三角形、梯形、圆形，或按依次输入的边界坐标（鞋带公式）计算任意多边形。Find a plot's area in acres, hectares, square feet and square meters: rectangle, triangle, trapezoid, circle, or any polygon from its corner coordinates in order (shoelace formula).
斜接角度计算器Miter Angle Calculator
木工斜接：输入正多边形边数（如相框 4 边、六角形 6 边）或两块板相交的夹角，算出斜切锯的角度设置和每块板的切角。For woodworking miters: enter the number of sides of a regular shape (4 for a picture frame, 6 for a hexagon) or the angle at which two boards meet, and get the miter saw setting and the cut angle on each board.
塔可自助吧食材计算器Taco Bar Calculator
按成人和儿童人数、食量估算塔可派对需要多少饼皮、肉、米饭、豆子、奶酪、生菜、番茄、莎莎酱和酸奶油；按每人示例用量计算，可调整。Estimate taco bar food for a party from the number of adults and children and how hungry they are: shells or tortillas, meat, rice, beans, cheese, lettuce, tomatoes, salsa and sour cream, using example per-person amounts.
比例尺换算计算器Scale Conversion Calculator
按比例尺（如 1:24、1:100、1:50,000）在实物尺寸和模型或图纸尺寸之间换算，也能由一组实物和模型尺寸求出比例；支持不同的长度单位。Convert between real size and model or drawing size at a scale such as 1:24, 1:100 or 1:50,000, or find the scale from a real and a model size, with different length units on each side.
ACT 综合分计算器（新版 / 旧版算法）ACT Score Calculator (Composite & STEM)
按 ACT 官方规则计算综合分（Composite）：新版 ACT（2025 年 9 月起所有考试）取英语、数学、阅读三科平均，科学不计入；旧版取四科平均，0.5 及以上进位。同时给出 STEM 分，以及离下一个综合分还差几分。Work out your ACT Composite by ACT's official rule: on the enhanced ACT (all tests from September 2025) it is the average of English, Math and Reading, with Science left out; on the legacy ACT it is the average of all four, with halves rounded up. You also get the STEM score and how many more points reach the next Composite.
PERT 三点估算计算器（工期与完工概率）PERT Calculator (Three-Point Estimate)
按 PERT 三点估算公式 E = (O + 4M + P) / 6、σ = (P − O) / 6，逐项计算任务的期望工期和标准差，汇总关键路径总工期，并估算在截止日期前完成的概率和 80%/90%/95% 把握的工期。Apply the PERT three-point formulas E = (O + 4M + P) / 6 and σ = (P − O) / 6 to each task, total the critical path, and estimate the chance of finishing by a deadline along with the 80%, 90% and 95% confidence durations.
连衣裙尺码计算器Dress Size Calculator
输入胸围、腰围、臀围，按 Marks & Spencer 女装标准尺码表算出建议的连衣裙尺码，并换算成英国、美国、德国、法国、意大利、俄罗斯等地区尺码和字母码；可选填身高，得到中国服装号型（如 165/84A）。支持厘米和英寸。Enter your bust, waist and hips to get a suggested dress size from the Marks & Spencer standard womenswear chart, converted to UK, US, German, French, Italian and Russian sizes plus a letter size. Add your height (optional) for the Chinese GB/T 1335.2 size code, such as 165/84A. Works in centimetres or inches.
草皮用量计算器Sod Calculator
输入草坪长宽（或直接输入面积）和损耗比例，计算需要多少平方英尺 / 平方米草皮、多少卷和多少托盘，并可按单价估算费用。Enter your lawn's length and width (or its area) and a waste allowance to find how much sod you need in square feet or square metres, how many rolls and pallets, and an optional cost estimate.
外墙挂板用量计算器Siding Calculator
按房屋周长 × 墙高加山墙三角形面积，减去门窗面积并加损耗，计算外墙挂板需要多少平方英尺 / 平方米和多少「方」（square，100 平方英尺），并可估算费用。Work out how much siding you need: perimeter × wall height plus the gable triangles, minus doors and windows, plus waste — in square feet or square metres and in squares (100 sq ft), with an optional cost.
保温层厚度与用量计算器Insulation Calculator
按目标 R 值、现有 R 值和保温材料的每英寸 R 值，计算还需要多厚的保温层、总体积，以及按包装覆盖面积需要几包；材料 R 值取自美国能源部和 PNNL 资料，也可自定义。Work out how thick your insulation needs to be from a target R-value, any existing R-value and the material's R-value per inch, with the total volume and the number of bags or packs from the coverage on the label. Material R-values come from US DOE and PNNL references, or enter your own.
泳池容积计算器Pool Volume Calculator
按矩形、圆形、椭圆形或肾形泳池的尺寸和浅端、深端水深，计算水量（立方英尺 / 立方米、美制加仑、升），并可按水泵流量估算注水时间。Find how much water your pool holds — rectangular, round, oval or kidney-shaped — from its size and shallow and deep-end depths, in cubic feet or metres, US gallons and litres, with an optional fill time from your pump or hose flow rate.
鱼缸容积计算器Aquarium Volume Calculator
计算长方体、圆柱、弧面（弓形前脸）、六角形和转角扇形鱼缸的水量（升、美制加仑、英制加仑）和水重，可扣除玻璃厚度和水面到缸口的距离。Work out how much water an aquarium holds — rectangular, cylindrical, bow-front, hexagonal or corner (quarter-circle) — in litres, US and UK gallons, with the weight of the water, optionally allowing for glass thickness and the gap below the rim.
蛋糕模具换算器Cake Pan Converter
把配方从一种蛋糕模具换到另一种：按圆形、方形或长方形模具的底面积（可多个模具）算出放大或缩小的倍数，并可直接把配料表按倍数换算。Convert a recipe from one cake pan to another: compare the base areas of round, square or rectangular pans (one or several) to get the scaling factor, and scale your ingredient list by it.
轮毂 ET 偏距计算器Wheel Offset Calculator
比较新旧两款轮毂的宽度和 ET 偏距，计算后距（backspacing）、前距，以及换装后轮胎内侧离悬挂更近或更远多少、外侧向外凸出或缩进多少毫米。Compare two wheels by width and offset (ET) to get each one's backspacing and front spacing, and how much closer the inside moves to the suspension and how far the outside pokes out or tucks in after the swap, in millimetres.
保龄球平均分计算器Bowling Average Calculator
根据总瓶数和局数计算保龄球平均分：平均分 = 总瓶数 ÷ 局数。给出精确平均分和联赛取整（向下取整）平均分，并可按“基准分 × 百分比”计算让分（handicap）。Work out a bowling average from total pinfall and games: average = total pinfall ÷ games. Shows the exact average and the league (rounded-down) average, and can compute a handicap from a basis score and percentage.
胶合板/板材用量计算器Plywood Sheet Calculator
根据要覆盖的面积和单张板材尺寸，计算需要多少张胶合板（或 OSB、石膏板等板材）：含损耗余量，向上取整为整张。支持英制（ft）和公制（m），并给出总面积和总价。Work out how many sheets of plywood (or OSB, drywall and similar) you need to cover an area — including a waste allowance and rounded up to whole sheets. Works in feet or metres and gives the total area and cost.
百分制转 GPA 计算器Percentage to GPA Converter
把百分制成绩按常见的美国 4.0 分制换算为 GPA 绩点和字母等级（A+/A/A−…F）。另提供简单线性估算 GPA ≈ (百分数 − 60) ÷ 10（不超过 4.0）。各校标准不同，结果仅供参考。Convert a percentage grade to a GPA and letter grade on the common US 4.0 scale (A+/A/A−…F). Also offers a simple linear estimate GPA ≈ (percentage − 60) ÷ 10 (capped at 4.0). Scales vary by school, so treat the result as a guide.
土壤/花园用土量计算器Soil Calculator
计算花坛、菜畦或容器需要多少土壤/堆肥：按长 × 宽 × 深求体积，给出立方英尺、立方码、升和立方米，并按袋装容量换算所需袋数。支持英制（ft/in）和公制（m/cm）。Work out how much soil or compost a garden bed, raised bed or container needs: length × width × depth gives the volume in cubic feet, cubic yards, litres and cubic metres, plus the number of bags for a given bag size. Works in feet/inches or metres/centimetres.
施肥量计算器Fertilizer Calculator
按目标氮肥施用率和肥料养分含量，计算草坪或菜地需要多少肥料；也可反过来，由已知肥料用量算出实际施入的氮量。支持每 1000 平方英尺（lb）或每 100 平方米（kg）两种常用施用率。Work out how much fertiliser a lawn or bed needs from a target nitrogen rate and the product's nutrient content — or, the other way round, the actual nitrogen delivered by a known amount of fertiliser. Supports the two common rates: pounds per 1,000 sq ft and kilograms per 100 m².
经纬度坐标系转换（WGS84/GCJ-02/BD-09）Coordinate Converter (WGS84 / GCJ-02 / BD-09)
在 GPS 使用的 WGS84、高德/腾讯/谷歌中国使用的 GCJ-02（火星坐标）和百度地图使用的 BD-09 之间批量转换经纬度，解决坐标放到地图上偏移几百米的问题。Batch-convert latitude/longitude between WGS84 (GPS), GCJ-02 (used by Amap, Tencent and Google Maps in China) and BD-09 (Baidu Maps), fixing the few-hundred-metre offset when plotting points on Chinese maps.
经纬度度分秒转换Degrees Minutes Seconds Converter
经纬度在十进制度（39.9087°）和度分秒（39°54′31.3″N）、度+十进制分之间互相转换，支持批量和各种写法，自动识别南纬、西经。Convert latitude/longitude between decimal degrees (39.9087°), degrees-minutes-seconds (39°54′31.3″N) and degrees + decimal minutes, in batches and with almost any notation, including S/W hemispheres.
硬盘整数分区计算器Disk Partition Size Calculator
计算 Windows 下分出「整数 GB」分区需要填写的 MB 数（如 100 GB 填 102796 MB），并把硬盘标称容量换算成系统里显示的实际容量，规划分区后还剩多少空间一目了然。Work out the MB value to enter so a Windows partition shows as a whole number of GB (e.g.
基坑回填土方量计算器Foundation Pit Backfill Earthwork Calculator
计算矩形基坑放坡开挖的挖方量、回填土方量、需要的天然土方量以及余土外运或借土的虚方量，按土方体积折算系数（天然 1.00、虚方 1.30、夯实 0.87、松填 1.08）换算，适合施工预算和土方调配估算。Work out excavation volume for a sloped rectangular foundation pit, the backfill volume, the bank (natural) soil required and the loose volume to haul away or bring in, using standard bulking factors (bank 1.00, loose 1.30, compacted 0.87, loose-filled 1.08).
大模型显存估算（训练 / 推理 / LoRA）LLM GPU Memory Calculator (Training, Inference, LoRA)
估算大语言模型推理和训练需要多少显存：推理按权重精度（BF16/INT8/INT4）加 KV 缓存（考虑 GQA、序列长度和批大小）；训练区分全参微调（AdamW 混合精度约 16 字节/参数）、LoRA 和 QLoRA，可估算激活值和梯度检查点，并给出需要几张 A100、H100 或 RTX 4090，内置 Llama、Qwen、Mistral 常用配置。Estimate GPU memory for LLM inference and training: inference = weights at BF16/INT8/INT4 plus KV cache (GQA, sequence length, batch); training covers full fine-tuning (≈16 bytes/param for mixed-precision AdamW), LoRA and QLoRA, with optional activations and gradient checkpointing — and how many A100, H100 or RTX 4090 cards you need.
大模型训练时长估算（6ND 算力公式）LLM Training Time Calculator (6ND FLOPs)
按 6 × 参数量 × token 数估算大模型训练的总计算量，再除以 GPU 峰值算力 × 数量 × MFU（模型算力利用率）得到训练时长，给出 GPU 小时、天数和估算费用；内置 A100、H100、H200、H800、B200、RTX 4090 等的 BF16 稠密峰值算力。Estimate LLM training compute as 6 × parameters × tokens, then divide by GPU peak × count × MFU to get wall-clock time, GPU-hours, days and cost; presets give dense BF16 peaks for A100, H100, H200, H800, B200, RTX 4090 and more.